J-PARC
High Energy Accelerator Research Organization (KEK)
Japan Atomic Energy Agency (JAEA)

IbarakiJ-PARC ANNUAL REPORT 2014

Japan Proton Accelerator Research Complex

Tokai

Vol.1: Highlight

J-PARCJR Joban L ine

Mito
Mt.Tsukuba

Tokyo

0

20

REPORT

Vol.1: Highlight40km

2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan

http://j-parc.jp/

J-PARC Center

J-PARC 16-03

ANNUAL2 O 1 4

NaritaUeno

J-PARCJ-PARC Annual Report 2014
Contents
Preface……………………………………………………………………………………………………………… 1
Accelerators………………………………………………………………………………………………………… 3
Overview……………………………………………………………………………………………………… 3
LINAC………………………………………………………………………………………………………… 5
RCS…………………………………………………………………………………………………………… 7
MR………………………………………………………………………………………………………… 10
Materials and Life Science Experimental Facility………………………………………………………………… 13
Overview…………………………………………………………………………………………………… 13
Neutron Source…………………………………………………………………………………………… 14
Neutron Science…………………………………………………………………………………………… 15
Neutron Device…………………………………………………………………………………………… 16
Muon Science……………………………………………………………………………………………… 17
Technology Development………………………………………………………………………………… 17
Particle and Nuclear Physics……………………………………………………………………………………… 19
T2K experiment…………………………………………………………………………………………… 19
Hadron and Nuclear Physics ……………………………………………………………………………… 21
Kaon Experiment …………………………………………………………………………………………… 23
COMET …………………………………………………………………………………………………… 24
Muon g-2 / EDM …………………………………………………………………………………………… 25
JSNS2 (J-PARC E56) Experiment …………………………………………………………………………… 26
Cryogenics Section ……………………………………………………………………………………………… 27
Overview…………………………………………………………………………………………………… 27
Superconducting Magnet System for the T2K beamline…………………………………………………… 28
Superconducting magnet system for the muon U-line at MLF…………………………………………… 29
Superconducting magnet system for the muon D-line at MLF…………………………………………… 29
Superconducting Kaon Spectrometer (SKS)………………………………………………………………… 30
Superconducting magnet system for COMET……………………………………………………………… 30
Superconducting magnet system for TREK………………………………………………………………… 30
Cryogen Supply and Technical Support…………………………………………………………………… 31
R&D for the Future J-PARC Project: New Muon g-2/EDM and Muonium HFS……………………………… 32
Information System……………………………………………………………………………………………… 33
Statistics of Network Utilization …………………………………………………………………………… 33
New network service "User LAN" for public J-PARC users…………………………………………………… 35
Statistics of Computer Resource Utilization………………………………………………………………… 35

Transmutation Studies…………………………………………………………………………………………… 37
Overview…………………………………………………………………………………………………… 37
Design of Transmutation Experimental Facility…………………………………………………………… 38
R&D for TEF-T……………………………………………………………………………………………… 39
R&D for TEF-P……………………………………………………………………………………………… 41
Other activities and international collaboration…………………………………………………………… 43
Safety ……………………………………………………………………………………………………………… 45
Radiation Safety…………………………………………………………………………………………… 45
User Service ……………………………………………………………………………………………………… 47
Users Office (UO)…………………………………………………………………………………………… 48
User Statistics……………………………………………………………………………………………… 50
MLF Proposal Summary - FY2014…………………………………………………………………………… 51
J-PARC PAC Approval Summary after the 19th Meeting…………………………………………………… 51
Organization and Committees…………………………………………………………………………………… 53
Organization Structure……………………………………………………………………………………… 54
Members of the Committees Organized for J-PARC………………………………………………………… 55
Main Parameters ………………………………………………………………………………………………… 59
Events ……………………………………………………………………………………………………………… 61
Events……………………………………………………………………………………………………… 62
Publications……………………………………………………………………………………………………… 69
Publications in Periodical Journals………………………………………………………………………… 70
Conference Reports and Books…………………………………………………………………………… 75
KEK Preprints……………………………………………………………………………………………… 83
Others……………………………………………………………………………………………………… 83
JAEA Reports……………………………………………………………………………………………… 83

J-PARC Annual Report 2014

Preface1

PrefaceThis volume describes the activities of the J-PARC Center from April, 2014, throughMarch, 2015. As it was discussed in the previous volume, the entire organization of
J-PARC was focused on the recovery of the facilities from the radioactive material
leak incident at the hadron experimental facility (HEF) in May, 2013. Thanks to
the deep understanding of the facility operation by many stakeholders and local
communities, we were able to restart the Materials and Life Science Facility (MLF)
and the Neutrino Experimental Facility in February and May, 2014, respectively.
Since then, we have been producing more results out of the data taken before andafter the incident. Typical examples of our achievements include: elucidation of
the neutrino oscillation phenomenon and investigation of the strong interactionin the area of elementary-particle and nuclear physics research, discovery of new
superconductivity phenomena, elucidation of functions in biological materials, anddevelopment of new materials in the area of materials and life sciences research. The
results are described in this volume. We have high hopes to develop further theselines of research, and contribute to unlocking the mysteries surrounding the originof the cosmos, matter and life.
Along the course of recovery from the incident, we worked hard to rebuild andstrengthen our safety management system, and reformed our organization to ensure
even better safety at J-PARC. We will continue with our unflagging efforts to advancePreface

J-PARC Annual Report 20142and become a research facility with a total commitment to safety. Our activities toimprove safety at J-PARC are also described in this volume.
I feel that my mission is to develop J-PARC, this international research center built
up by my great predecessors, into a research facility which can contribute further
to the progress of humankind. I plan to achieve this by promoting collaboration
with research institutions inside and outside of Japan, expanding the facility use byvarious industries, promoting interdisciplinary research, which makes the most of
J-PARC's unique characteristics as a multi-purpose facility, and broadly sharing theobtained research results with the public.
As we move forward, I would like to ask for your understanding, guidance andencouragement.

Naohito SAITO
Director of the J-PARC CenterAccelerators

Overview
After a 9-month shutdown due to the radioactive
material leak incident in the hadron experimental facility, the user operation of the Materials and Life science
experimental Facility (MLF) was resumed on February
17, 2014, with a beam intensity of 300 kW. For the Main
Ring Synchrotron (MR), the 3-GeV injection beam fromthe Rapid-Cycling Synchrotron (RCS) was accelerated to
30 GeV and extracted by the fast extraction system tothe abort beam dump on March 30, 2014, for the firsttime after the incident. After high power beam tuning,
the beam delivery to the Tokai-to-Kamioka (T2K) experiment restarted on May 16. The delivered beam intensity
before the summer of 2014 was 210-240 kW.
During the summer shutdown period, the replacement of the front-end part to increase the peak current
from 30 mA to 50 mA was one of the most important
improvements in the linac. The peak current of 50 mA is

necessary to achieve the design beam intensities, 1 MW
for the RCS and 750 kW for the MR. The new front-end
system has an rf (radio-frequency)-driven ion source
and RFQ optimized for accelerating the 50 mA beam.
After a continuous one-month test run with 50 mA at
the output of the RFQ in a test bench, the new front-end
system was installed in the linac tunnel in August, 2014.
The beam operation of the linac started on September
29, and a 50-mA beam acceleration was reached on
October 15.
After the maintenance, the user operation for theT2K experiment and the MLF users was restarted on
November 2 and 4, respectively. In November andDecember the delivered beam power in the operation
for the T2K experiment was 220 - 260 kW and that for
the MLF users 300 kW.
High power beam study of the RCS was performed

Accelerators

J-PARC Annual Report 2014

4in October, 2014, and during a short pause of the user
operation in December, 2014 and January, 2015. In
October, 2014, the RCS successfully demonstrated
beam acceleration and extraction with an intensity of13
up to 773 kW-equivalent (6.44×10 particles per pulse)
in a single-shot operation mode. However, beam acceleration with an intensity larger than 800-kW-equivalent
could not be achieved due to insufficient current
capacity of the anode power supplies for the rf power
amplifiers. In the study of December and January, theresonance frequencies of all twelve rf cavities were
shifted from 1.7 MHz to 2.1 MHz to reduce the required
current in the anode power supplies. As a result, onJanuary 10 the RCS successfully accelerated and13
extracted a 1.01-MW-equivalent beam (8.41×10 ) insingle shot mode. Although more studies are required
to reduce the beam loss and it is also necessary toreinforce the anode power supplies of the rf power
amplifiers, the achievement of 1-MW-equivalent beam
acceleration is an important milestone for the J-PARC
accelerator.
An incident with a burning transformer of the
septum magnet power supply occurred in the MLF
muon facility on January 16, 2015. All J-PARC facilities
were shut down for a month due to the incident. The
accelerators resumed beam delivery to the T2K experiment on February 25, 2015, and to the neutron usersof the MLF on February 26, 2015. Before the user
operation for the T2K experiment was restarted, beamstudies for suppression of the transverse beam instability and correction of the betatron resonances were
performed in the MR. To ensure beam instability suppression, the betatron tune, parameters of two typesof bunch feedback systems, patterns of rf voltage andStartup, etc.,
668
Trouble(MLF),
43
Trouble(Acc),
426

LINAC/RCS
tuning& study
1296

Startup, etc.
1021

Trouble, 167
Trouble, 45

MLF useroperation,
3258

sextupole magnet field were optimized in the timingsof beam injection and acceleration. To correct the resonance, parameters of four skew-quadrupole magnets
were optimized for correction of the linear coupling
resonance. As a result of the study, the beam loss of
the MR was reduced and it became possible to increase
the delivered beam intensity for users from 260 kW to
320 kW. The MR continued stable beam operation with
320 kW beam power for the T2K experiment until theend of March, 2015. On March 26, the delivered number of protons to the neutrino target since April, 2010,21
when physics data taking began, exceeded 1×10 . For
the MLF users, the RCS increased beam power from300 kW to 400 kW on March 10, 2015.
Figure 1 shows statistics of the accelerator operation in Japanese Fiscal Year (JFY) 2014. The total
operation time was 5495 hours. The availability of theuser operation was 85.6% for the MLF and 82.8% for theT2K experiment excluding the one-month shutdown
due to the fire incident. Figure 2 shows the causes ofbeam trips and down time in JFY2014. The beam stops
exceeding 100 hours were due to troubles in the highvoltage transformer of the klystron power supply of
the linac and the bending magnet power supply of the
RCS. Diode modules in the high voltage transformerof the klystron power supply were damaged by voltage surge. We took some countermeasures against thevoltage surge in the 2014 summer shutdown period.
Since then, we did not encounter the same problems.
The problem with the RCS magnet power supply wascaused by breakdown of choke transformer’s oil circulating pump. The broken pump was replaced with aspare one and the user operation restarted after a week.

3NBT/MLF
tuning &study 273

Trouble(NU),36
Trouble(Acc),
341

LINAC/RCS
tuning &study 1296

Trouble, 167
350BT/MRtuning &study, 991
Trouble, 145
NU user
operation,
2188

Fig. 1. Statistics of MLF and neutrino user operation in JFY2014.

J-PARC Annual Report 2014

Accelerators

192:00:00
168:00:00
144:00:00
120:00:00
96:00:00
72:00:00
48:00:00
24:00:00
0:00:00
BLM
RFQ
MEBT1
DTL
SDTL
DBNCH_old
MEBT2
ACS
DBNCH
HVDC
IonSource
MagnetVAC
Others
BLM
KMPS
BM
QM
SM
ST
Bump
Sep
RF
OthersBLM
Others
BLM
QM
SM
BM
ST
RF
InjconSlowExt
FastExt
OthersMLF
HadronNeutrino
Earthquake
PowerOutage
othersDown me [hours]

5_LINAC__RCS__3NBT_

Causes of beam trips

_MR_

_EXP_

_Others_

Fig. 2. Causes of beam trips and down time.

LINAC
To realize the nominal beam power of 1 MW at the
RCS and 0.75 MW at the MR, the linac peak beam current
had to increase from 30 to 50 mA. In order to facilitate
the upgrade, we developed a new front-end system
consisting of a negative hydrogen ion source and an
RFQ for 50 mA operation. We developed a cesiated RFdriven ion source using an internal RF-antenna built
at the Spallation Neutron Source (SNS) at Oak Ridge
National Laboratory (ORNL) (Fig. 3). It successfully produced a peak beam current of more than 60 mA with aduty factor of more than 1.25% stably. A new RFQ was
designed and fabricated (Fig. 4). There is a significant
structural difference between the new and the previous
RFQ. The RF cavity of the previous RFQ was installed ina large vacuum vessel. Because the surface area of thistype is very large, it was difficult to obtain good vacuum
quality. Therefore, a vacuum-tight cavity structure wasadopted for the new RFQ.
After a one-month continuous test run with 50 mA
at the output of the RFQ in the test stand, the front-end
system was installed in the linac tunnel in August, 2014.
In order to chop the 50 mA beam for making the intermediate time structure of the linac beam pulse, the RF
chopper cavity was also replaced with a newly fabricated one with a larger aperture and longer gap length
between electrodes to decrease unexpected beamloss in the cavity (Fig. 5). Two new scrapers were also
installed to absorb the higher power of the deflectedbeam by the chopper cavity.
The beam operation of the linac was resumed on
September 29. The ion source has been successfully providing the required beam to the accelerator with almost
no serious problem, except for the RF antenna failurecaused by the excess cesium due to a misoperation ofFig. 3. Cesiated RF-driven negative hydrogen ion source.

Fig. 4. RFQ for 50 mA operation.

Accelerators

J-PARC Annual Report 20146in the summer of 2013, are running stably. The vacuum
pressure and the RF trip rate have been reduced throughthe beam operation. During this operation period, thealuminum chain clamp used in the ACS beam line suddenly broke down, which caused vacuum leakage
problem (Fig. 7). To prevent the same from happening,
we replaced all aluminum chain clamps in the ACS beamline with stainless steel ones. After the replacement, novacuum problems were observed.

Fig. 5. New chopper cavity for 50 mA operation.

the cesium injection system once. We observe the RFQ
RF-trip about 10 times daily during the user operation,
which decreases the beam availability by about 1%.
We attempt to reduce the trip rate by testing certain
measures, like adding vacuum pumps to improve thevacuum in the cavity.
We challenged the first 50 mA beam acceleration
test in the restart commissioning after the summer shutdown. After careful tunings, which took two weeks, we
successfully demonstrated 50 mA beam acceleration
to 400 MeV on October 15 (Fig. 6). The beam was transported to a dump for beam study just upstream of RCS
without any reduction of the beam transmission quality.
That was an important milestone toward a user operation with design beam power. We observed, however,beam loss at several spots along the beam line. Further
beam study is needed to ensure a stable operation atdesign beam power. For the acceleration of the 50 mA
beam, we introduced a new method for verification ofcavity tuning. Since the increase of beam power results instricter demands for preventing beam loss, the verification of operation points is essential to avoid unnecessary
beam loss. The effectiveness of this method has alreadybeen proven. The RF of one DTL cavity was found to be
8% lower than the designed parameters.
The ACS (Annular-ring Coupled Structure) cavities,
installed to increase the linac beam energy to 400 MeV

Fig. 6. Beam current along the linac beam line.

Fig. 7. Broken chain clamp(crack in the hooking part of the chain).

On June 30, 2014, a HVTR (high voltage transformer)of klystron power supply #5 broke down due to failureof capacitors in the HVTR assemblies. The same troubles
occurred at the HVTR in the power supply of #1 and #2
in 2012 and 2013, respectively. The surface observationof the broken capacitors showed the failure was due toovervoltage to the capacitor. We refurbished the HVTR
by replacing the old capacitor with a new one with
better high voltage properties. After applying thesecountermeasures, we did not encounter any more HVTR
problems in this period.
At some SDTL cavities, the multipactor region, where
the VSWR become very high, has been observed after
the earthquake in 2011. The region of the SDTL #05B
spread significantly with the operation time. We applied
various countermeasures (improvement of the vacuum
condition, cavity baking, and so on), however, they did
not provide sufficient improvement. Recently, we foundthat the upper boundary of the region can be shiftedwith detune condition, which is caused by a changing
tuner position (Fig. 8). At present, SDTL #05B is operated
with detune condition of - 1 kHz. We expect the upperboundary not to exceed the operation power condition
for a few years with this condition. To solve this problem
drastically, we will try some ideas and continue the simulation with various tuner parameters.

J-PARC Annual Report 2014

Accelerators

7
3.5

S05B: Detune=+6deg.(+1kHz)
S05B: Detune=0deg.
S05B: Detune=-3deg.(-0.5kHz)
S05B: Detune=-6deg.(-1kHz)
S05B: Detune=-9deg.(-1.5kHz)

VSWR

3.0
2.5
2.0
1.5
1.0
400

500

600

700

800

900

1000

1100

Klystron Output Power [kW]Fig. 8. VSWR of SDTL #5B as a function of klystron output
power for various detune condition.

RCS
The beam power of the routine operation of the
J-PARC RCS increased gradually for the MLF user operation, and a 400-kW user operation has been performed
stably from March 10, 2015. Beam studies were also
performed to demonstrate the capability of the RCS
to operate at powers in excess of 1 MW. The study pro13
duced a beam intensity of 8.41 × 10 protons within ashort time, an intensity equivalent to a 1.01-MW operation, on January 10, 2015.
OPERATION FOR THE USER PROGRAM
The RCS could deliver beam with power of 300 kW
to both the MLF and the MR for their user operation
with an average availability of more than 95%. The
duration of the summer maintenance period is usually
three months (from July to September), but last summer it was four months to provide time for replacementof the front-end (ion source and RFQ) of LINAC. Beamstudies were performed in spare moments from theroutine operation in the end of June, end of December,and mid-January. A stable user operation for the MLF
and MR could be continued with 300 kW beam power.
The beam power had been limited 300 kW for the MLF
due to government permission of radiation safety,
but it became possible to increase the beam power to
1 MW for the routine operation at the RCS after December 2014 because we obtained the government permission. Beam power increased gradually for the MLF user
operation and beam power of 400 kW was achieved on
March 10.

The availability of the RCS was not that good
before the summer maintenance. There were mainly
two causes of machine malfunction, one was the failure of an oil cooling pump in the bending magnet
choke transformer that caused down time of about
110 hours; the other was a newly-installed power supply for injection bump magnets. The total down time
was about 171 hours during one year, and almost 95%
of it occurred before the summer maintenance. Afterthe restart of the user operation in November, the RCS
could continue to maintain a stable user operation.
(7)
(6)

(4)

(1)

(8)

(5)
Ring-collimator

(9)

(3)

(10)
(2)

(12)
(11)

Fig. 9. Residual dose measurement points and new correction
magnets installation points at RCS.
(1) 100-degree dump, (2) injection branch, (3) 1st charge
exchange foil, (4) H0 dump, (5) entrance of 1st arc at
downstream of the ring collimator, (6) Dispersion peak
point, (7) Dispersion peak point, (8) Extraction septum
magnet #3, (9) Dispersion peak point, (10) Dispersion
peak point, (11) Dispersion peak point, (12) Dispersion
peak point , and QDT1-6 : new correction magnets.

Accelerators

J-PARC Annual Report 2014

8
This year the residual dose distributions of the RCS
were measured several times. The residual dose measurement points are shown in Fig. 9. The points shownin this figure were registered at a radiation level of morethan 10 µSv/h. These values, typically measured on July
1, 2014, and April 1, 2015, were summarized in table
1. After three-week user operation with beam powerof 300 kW, a two-day high-intensity beam study was
conducted on July 1, 2014, and the residual dose wasmeasured four hours after the beam stopped. Consequently, after a two-week user operation with beam
power of 400 kW performed from March 18 to April 1,
2015, the residual dose was measured four hours after
stopping the beam. All values described in table 1 wereresidual dose measured on contact with each device.
The residual dose of beam dump (measurement point(1)) was very big in spite of the temporary use. The
use of a high residual material (nickel with thicknessof 10 mm) for the vacuum window was the reason forsuch a high activation. This window was replaced withlow activation material (thin titanium with thickness of
0.3 mm). The residual dose of the vacuum chamber ofthe 1st charge exchange foil (measurement point (3))
was huge due to neutrons produced by interaction
between the foil and the injection/circulation particles.
Since this activation would limit the beam power of the
RCS, the reduction of the number of particles passing
through the foil becomes a key issue.
Table 1. Residual dose measured on 1st July 2014 and 1st April
2015.
Residual dose on contact [μSv/h]

Measurementpoint

1 July 2014

1 April 2015

(1)

8000

Not measured

(2)

2200

6000

(3)

3300

15000

(4)

900

2100

(5)

170

1100

(6)

220

110

(7)

60

300

(8)

<10

40

(9)

<10

150

(10)

<10

80

(11)

<10

70

(12)

<10

110

st

st

MAINTENANCE AND IMPROVEMENTS
Several kinds of maintenance and improvements
were performed during the maintenance period. The
details of the typical advancement and exposure doseat that time are described in this section.
1) Improvement of the beam transport line
There was enormous residual dose near the beam
dump installed in the beam transport line, now used
only for the linac beam tuning, as described in the previous section. Since this dump will be used not only forlinac beam tuning but also for shaping the injection
beam from the linac to the RCS, we improved the beamtransport line near the beam dump, as shown in Fig. 10.
The thick vacuum window was replaced with a new one
made by thin titanium covered with radiation shield. A
new rail was installed for moving and transporting thisvacuum window for maintenance. Current transformer
and wire scan monitor were installed to measure thebeam current and shape with high resolution.

beforeaer

Vacuum window

Beam dump(4)New wire scan monitor(3)CT(1)New vacuum window
with radiaon shielding

Beam
dump

(2)railFig. 10. Pictures of the beam transport line near the beam
dump (we call it a 100-deg beam dump, shown in Fig.
9(1)) before and after the improvements in the 2014
summer shutdown.

2) Installation of correction quadrupole magnets
Reducing the number of particles which passthrough the foil, as described in the previous section,
is a key issue. The large transverse painting is one ofthe possible methods to fix the issue. It is difficult toJ-PARC Annual Report 2014

Accelerators

93) Exposure dose during maintenance
The exposure dose during the summer maintenance in 2014 is summarized in table 2. An exposure
dose of more than 0.01 mSv was detected in 53 workers.
The corrective dose was 3.7 mSv, and the average exposure dose was 0.07 mSv. The maximum exposure dose
was 0.31 mSv due to vacuum leakage test in the injection area. Our radiation protection and control for eachworker was found to work well and the RCS tunnel was
clean.
Table 2. Summary of the exposure dose during the summer
maintenance in 2014.
Exposure dose [mSv]0.01-0.05
0.06-0.1
0.11-0.2>0.21

Number of workers
31
10
8
4

HIGH POWER BEAM STUDY
Beam studies were also performed to demonstrate
the capability of the RCS to operate at powers in excess
of 1 MW. On January 10, 2015, the study produced a13
beam intensity of 8.41×10 protons within a shorttime, an intensity equivalent to a 1.01-MW operation.
Figure 11 shows the circulating beam intensity over
20 ms from injection to extraction measured by current
transformer. The 1 MW operation will require modification of the RF anode power supplies this summer. The
1 MW operation has been enabled by the linac upgrade
to 400 MeV and the front-end upgrade to 50 mA. Studies were performed to demonstrate the capability of
the RCS to operate at powers in excess of 1 MW. The
study results are very promising and suggest that producing 1 MW is feasible, even without full ameliorationof the RF issues.

9

Number of particles / pulse (×1013)

perform the large transverse painting at present, thereason why the beta function beating excites various
random betatron resonances through a distortion of
the lattice super periodicity, which makes the extra
beam loss. To correct the beta function beating causedby the edge focus of the injection bump magnets, six
correction quadrupole magnets were newly installedin the tunnel.

8
7
6
5
4

8.41×1013
7.86×1013
6.87×1013
5.80×1013
4.73×1013

3
2
1
0
-2 0

2

4

6

8 10 12 14 16 18 20 22

Time (ms)Fig. 11. Circulating beam intensity over 20 ms from injection to extraction measured by a current transformer(DCCT). The horizontal axis shows time and the vertical axis is the number of particles per pulse measured
by the DCCT.

SUMMARY
The beam power of the routine operation of the
RCS increased gradually for the MLF user operation,with beam power of 400 kW user operation being utilized. The residual dose distributions of the RCS were
measured several times after a routine operation. Beamstudies were also performed to demonstrate the capability of the RCS to operate at powers in excess of 1 MW.
As a result of measurement of the residual dose
after routine operation and high power beam studies, it
was concluded that the requirements for a 1-MW stableroutine operation are as follows:(1) Modification of the RF anode power supplies toreduce longitudinal beam losses,(2) Reduction of the number of particles passing
through the 1st charge exchange foil to reduce theresidual dose of the vacuum chamber of the foil.
We have to continue solving those issues and thebeam power will be increased gradually with the goal
to reach the design power of 1 MW.

Accelerators

J-PARC Annual Report 2014

10

MR
Operation status
The 30-GeV beam extracted from MR was fully
used for the neutrino experiment in JFY2014 because
the hadron beam line was still under reconstruction.
Figure 12 shows the history of the MR beam power.
Until the end of December, 2013, the 265 kW beam
was accelerated stably for the practical operation.
In January, 2014, the beam power of MR has reachedapproximately 310 kW on the neutrino production
target. In March, 2014, the beam power for the practicaloperation increased to 330 kW. It was a high point for
MR in JFY2014.

500

Channels:
MRMON:DCCT_073_1:VAL:MRPWR

Beam Injection system
The beam injection system of MR consists of injection septum magnets, an injection kicker and collimators.
The modification of each of the components has started.
Injection septum magnet
MR has two injection septum magnets. A new first
injection septum magnet with its own power supply has
been developed because the present septum magnet
cannot accept beams not only with higher repetition
rate but also with higher energy. The power supply has
been assembled and tested. However, it was found outthat the vibration amplitude of the new septum magnet
was bigger than the acceptable value. Thus, the magnet is being repaired. The system will be installed in the
beam line in the summer shutdown period of 2015.

400

200

100

0

05/01/2014
00:00:00

08/01/2014
00:00:00

10/01/2014
00:00:00

01/01/2015
00:00:00

03/01/2015
00:00:00

Fig. 12. History of MR beam power.
Abscissa: Date (Apr.1 ’14 ~ Mar.31 ’15)
Ordinate: Beam power (0~500 kW).

Fraction of current

Injection kicker magnet
One of the biggest issues of MR is the pulse shape ofthe current for the injection kicker magnet, as shown in
Figure 13. The following issues have been encountered:300

1

Kicker waveform

320ns
0.8

2013

0.6

2014

0.4

0.2

Future plans
The design beam power of MR is 750 kW for theneutrino experiment. It is expected to achieve a beam
power of 750 kW by reducing the beam repetition
period from 2.48 s to 1.3 s or less. Therefore, many piecesof the MR equipment must be modified or replaced tocomply with the shorter repetition period of 1.3 s, as
follows: (1) The power supply of the main magnets; (2)The RF cavity; (3) The injection magnet and its power
supply; (4) The fast extraction magnets and their power
supplies; (5) The injection collimators; (6) Beam ducts,
etc. The production of almost all equipment, except for(1) magnet power supply, is in progress.
Furthermore, it has also been planned to increase
the injection energy in the future in order to reduce thebeam loss at the beam injection period.

0
0

1

2

3

4

5

×10-6
6
time (sec)Fig. 13. History of the MR beam power(1) There is a small peak in the tail of the pulse. It kicks
the circulating beam previously injected.
(2) The pulse rise time (320 ns) is not fast enough.
Although it is possible to speed up the rise time(200 ns), one more peak appears in the tail.
In order to compensate the peaks of the tail, asmall correction kicker magnet was considered. As
the correction magnet is being developed, it will be
installed in the summer of 2015.
Injection collimator
Two new injection collimators were installed in
the beam line in the summer of 2013. The new colli-J-PARC Annual Report 2014

Accelerators

11
mators increased the acceptable beam loss from 2 kW
to 3.5 kW which is required for the operation withthe design beam power of 750 kW. These have beamducts made of titanium instead of ducts made of stainless steel because the residual radiation level of thetitanium duct is smaller than that made from stainlesssteel. However, vacuum leakage occurred in the welding
region between the duct for the collimator and the bellows. Thus, the new collimators and the leaky duct were
removed and the layout of the collimators was restored
to the original one, as shown in Fig.14. The reason for thevacuum leakage is now under investigation.

(a) Layout of the collimators (2011, 2014)

Fig. 15. Result of magnet survey in the horizontal planeBlue & red dots are measured data. Orange dots aredesign position.

RF cavity
The RF cavities, which accelerate the proton beamfrom 3 to 30 GeV, contain a core made of a magnetic
alloy named Fine-Met FT3M. In order to increase the
MR repetition rate, the accelerating voltage of the RF
cavities must be approximately doubled because theaccelerating period is reduced by half. The doubled
accelerating voltage is achievable by the lower loss
core made of Fine-Met FT3L which has been recently
developed.
The first cavity with FT3L core has been installedin the tunnel as shown in Fig.16. It has been used forthe practical operation without problems. Furthermore,
the mass production of the new cavity is ongoing. Four
more cavities with FT3L core will be installed in the tunnel in the summer of 2015.

(b) Layout of the collimators (2013)
Fig. 14. Layout of the injection collimators.

Alignment
The magnet alignment was confirmed during thesummer shutdown period of 2014. The results are summarized in Fig.15. A previous measurement was conducted in 2012. The result did not show significant
differences. Thus, re-alignment of the magnet was not
required.

Fig. 16. Installed new FT3L cavity with 5 gaps.

Accelerators

J-PARC Annual Report 201412
Beam monitor
Topic of the monitor development is the installation of the Optical Transition Radiation (OTR) monitor in
the beam line from RCS to MR. The monitor has not only
OTR but also a fluorescence sheet for the beam hallo
observation. The combination of both increases the
dynamic range of the monitor to approximately 40dB.
The schematic structure and test results of the monitor
are shown in Fig.17. It is the very powerful tool to deal
with the hallo of the beam coming from the RCS.

Preventive measures for the hadron incident
13
On May 23, 2013, 2×10 protons were extracted
on the hadron target made of gold in 5 ms period.
13(In the normal operation 2×10 protons are slowly
extracted over 2 s.) It was caused by malfunction of theEQ-magnet system of the slow extraction mode for the
hadron experiment. After the incident, counter measures to prevent the short-pulse extraction were proposed. In order to resume the slow extraction mode,the measures must be completed. Table 3 shows theresults of the applied preventive measures. The following of the proposed measures will be sufficient to prevent the occurrence of phenomena that can extract abeam in a short period of time.
Table. 3. Preventive measures for short-pulse extraction
System in
May 2013

Preventive measures

Anomalous current deviation in the
EQ-PS & feedback system

Only warning

Stop the beam operation &shutdown the power supply

Current limit

340A (Max. of
the Ps)< 120mA ( < Max. for the user
operation)

Response time of shutdown when anabnormal occurrence is detected

> 6ms

< 1ms

(a) Schematic view of the monitor(b) Example of the output signal
Fig. 17. OTR monitor(a) Inside structure of the monitor(b) left: Observed profile, middle: Horizontal profile,right: Vertical profile.

Beam commissioning
As mentioned before, MR succeeded to accelerate abeam with power of over 300 kW. It was achieved by anumber of efforts, as follows: (1) beta modulation correction with quadrupole trim coils, (2) third order resonance correction with sextupole trim coils, (3) a second
harmonic RF cavity. These efforts have been appliedat the original operation point (22.2, 20.5). In the view
point of the beam loss reduction, new operating
point around (21.4, 21.4) was studied very precisely.
The study of new operating point would continue inJFY2015 because the new operation point is the candidate of the operation for the 750-kW beam.

Summary
The main topics of the MR in JFY2014 are summarized below:(1) MR delivers a stable 265-kW beam for users in
2014. The beam power increased to more than
300 kw from January 2014.
(2) The new collimator system was removed due tovacuum leakage of the titanium ducts.
(3) The first cavity with FT3L cores has been installed
and used successfully in the ring.
(4) Counter measures to prevent the beam extraction
in short period of time have been completed.

Materials and Life Science
Experimental Facility
OverviewrdAfter the incident at the Hadron Facility on May 23 ,2013, J-PARC/MLF resumed the beam operation for thethuser program on February 17 , 2014. In JFY2014, MLF
maintained a steady 300-kW operation with gas microbubbles injection in the neutron target. The scheduled
beam time in JFY2014 was 166 days with availability of
69%. The number of proposals was 780, and the numberof unique users was 895.
In JFY2014, 18 instruments were under operation forneutron science. The construction of BL06 (VIN ROSE),
BL22 (RADEN) and BL23 (POLANO) at the neutron facility advanced, and VIN ROSE and RADEN reached thecommissioning phase. As for the muon beam lines,
the D1 and D2 instruments were dedicated to the user

programs and U-line and S-line were under commissioning.
We had a fire accident at the muon area on Januarythth
16 , 2015, and the beam stopped until February 25 ,2015. We decided to carry the user experiments
canceled due to the accident over to 2015A. Afterthe accident, we reconsidered our protocols related
to safety issues. The operation manuals had beenreviewed. We also introduced a new working standard
protocol. According to the new protocol, all activities
conducted at MLF will be checked by each section. Any
suspected activities found by each section will be evaluated by MLF safety reviewing, which will be held at theregular MLF meetings.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201414

Neutron Source
On January 12, 2015, for the first time ever proton
beam pulses were accelerated to reach a power equivalent of 1 MW in the 3-GeV Rapid Cycling Synchrotron
and successfully delivered to the neutron production
mercury target through the 3-GeV proton beam transport facility. It was an exciting moment for the staff ofthe neutron source section and an important milestone
for J-PARC towards steady operation with a 1-MW beam.
As for the user operation, until the summer shutdown
period the neutron production mercury target has
been operated steadily at a beam power of 300 kW
with mitigating pressure waves successfully induced init thanks to the gas micro-bubbles injection. The accumulated beam power on the target reached 2050 MWh
at the end of June, 2015.
During the summer shutdown period, the mercury
vessel was replaced with an advanced one with doublewall structure and a narrow width of 2 mm at the target
front. Figure 1 shows the conceptual view of the double-wall structure. Part of the mercury flow is directed
into the narrow channel with velocity of 4 m/s without
passing through the bubbler, a gas micro-bubbles generator. The rest of the flow passes through the bubbler
and advances to the inner wall with micro-bubbles. This
structure enhances the cooling performance of theinner wall, making it possible to increase the wall thickness from 3 to 5 mm. This prolongs the life time of thetarget front preventing cavitation damage from operations with a higher beam power.

It was the second replacement operation sinceNovember, 2011, in the history of JSNS. We cut out
a disk-shaped specimen from the target vessel front
with a remote-handling cutting device. Unfortunately,
the specimen fell into the target vessel. However, as
shown in Fig.2, we could observe the mercury flow
facing surface of the specimen and did not register any
visible damages there. This proved the mitigation of
mitigating pressure waves with the gas micro-bubbles
injection. Based on this promising result, we upgraded
the operational proton beam power from 300 to 400 kW
from March, 2015.
An issue, sensitive from environmental point ofview, emerged during the target vessel replacement
operation that a certain amount of tritium could be
released at the time when surrounding air came into
the target vessel when it was removed from target
trolley. The major mechanism of tritium release is theisotope exchange reaction between the air moistureand the tritium adhered in the target vessel. We introduced a process to evacuate the target system by an
off-gas processing system when the surrounding air
entered the target vessel, suppressing successfully thetritium release through the stack to an amount of about
12.5 GBq, which was about only 5.4% of the estimatedvalue. It was a promising progress for us because thetarget is planned to be irradiated until it reaches theaccumulated power of 5000 MWh or more in the future.

Fig. 1. Inner structure of the double-walled target vessel.

Fig. 2. D isk-shaped specimen cut out from the target vessel.
The mercury flow facing surface of the specimen isoutlined with red line.

J-PARC Annual Report 2014

Materials and Life Science Experimental Facility

15

Neutron Science
1. User Program
In 2014A and 2014B proposal rounds, 17 neutron
instruments have been operating for users and 603
proposal applications were submitted for them. 345
proposals were approved. The reserved ones were 81.
The beam operation scheduled for the period startingfrom January 17, 2015, was affected by the fire accident
in the Muon area in MLF and the troubles at RCS and theneutron source, so a total of 33.5 days of user beamtime
was lost. The experiments which could not be carriedout in those terms from January to March were carriedover into 2015 as exceptional measures.
2. Instruments development and construction
The VIN-ROSE at BL06 (constructed by Kyoto University and KEK), which consists of a neutron resonance spinecho (NRSE) instrument and a modulated intensity by
zero effort (MIEZE) instrument, and an energy-resolved
neutron imaging system, RADEN, at BL22 (constructedby JAEA) received the first neutron beam on April 22(Fig. 3) and November 4, 2014, respectively. Both beamlines proceeded to the commissioning phase.
The construction of the polarized neutron chopper
spectrometer POLANO at BL23 (constructed by Tohoku
University and KEK) continued.

Fig. 3. First beam of the VIN ROSE.

3. International Activities
MLF held the 2nd MLF School from December 16 to
19, 2014. The Neutron Science Section contributed to
the neutron part of the school. 7 neutron instruments
were provided for practical experiments.
The 14th Korea-Japan Meeting on Neutron Science
was held from January 7 to 9, 2015, at the Ibaraki Quantum Beam Research Center. 50 Japanese and 29 Koreanscientists participated.
4. Resultant outcomes
The research activities in neutron science at MLF
resulted in more than 120 papers. The number includes
articles in influential journals such as Nature Physics
and Nature Communications.
Two staff members, Dr. H. Nakagawa and Dr. N. L.
Yamada won the Encouraging Prize of the JapaneseSociety for Neutron Science. Prof. M. Hino of Kyoto University received the Technology Prize of the JapaneseSociety for Neutron Science for his work in developing
neutron optical devices for VIN-ROSE.
We distributed 6 press releases on scientific outcomes and technical development from our beam lines.
• Combination of neutron and X-ray inelastic measurement reveals the whole scheme of electron excitation
states: Electron doping effect on high-energy magnetic
excitations in high-Tc cuprate. (Apr. 25, 2014)• How does water define the shape of DNA? Local
dynamics coupled to hydration water determines
DNA-sequence-dependent deformability. (Aug. 29,
2014)• Combination of neutron and X-ray inelastic measurement reveals the whole scheme of electron excitation
states: Electron doping effect on high-energy magnetic
excitations in high-Tc cuprate. (Apr. 25, 2014)• Finding hydrogen in iron dissolved under high-pressure:
Determination of site occupancy of interstitial deuterium atoms in face-centered cubic iron. (Sep. 26, 2014)• New elemental analysis realized with J-PARC: Development of Time-of-flight prompt gamma-ray analysis(TOF-PGA) for multi-elemental analysis. (Dec. 22, 2014)• New hydride with Cr: Predicted by the first principle
calculation and confirmed by neutron scattering. (Mar.
24, 2015)

Materials and Life Science Experimental Facility

J-PARC Annual Report 201416

Neutron Device
Large Area One-dimensional Scintillator Neutron Detectors for TAKUMI at BL19
Neutron Detectors installed at TAKUMI, BL19, arelarge one-dimensional neutron detectors with a sensitive area of 1000 cm×20 cm and a position resolution of
3 mm, which have been developed under international
collaboration with ISIS, Rutherford Appleton Laboratory. The detector has 360 pixels, each with size of
3 mm×20 mm. Determination of the incident neutron
position was established introducing a 2Cn coding method in the arrangement of fiber bundle to photomultipliertubes (PMTs), and hence each of the 360 pixels can be
specified by only 48 PMTs. Last year this type of detector was fabricated and delivered to BL19 and a total of
12 detectors will be operating at TAKUMI. These detectors have neutron sensitivity of 50% at 1 Å and gamma-6
ray sensitivity of less than 10 at energy of 1.3 MeV. Its

performance met sufficiently the requirements for residual stress analysis in neutron scattering experiments
at BL19.

Fig. 4. A Photograph of the neutron detector developed for
TAKUMI.

Development of Alternatives to 3He Gas-based Neutron Detectors in Nuclear Security
The recent shortage of Helium-3 stockpiles had
severely affected various fields such as neutron science and nuclear security. Thus, it is quite urgent todevelop a technology, alternative to the conventional
3
He gas-based neutron detectors. On the other hand,10
we have developed a new neutron sensitive ZnS/ B2O3
ceramic scintillator which has been adopted successfully in detectors of BL03, BL17, and BL18. Therefore, wehave started to develop alternative detectors using the
10
ZnS/ B2O3 ceramic scintillators for nuclear safeguards
application with support from the Japanese government, and consequently designed a new detector as
shown in Fig. 5. The detector’s design is simple, comprising of a scintillator strip, a light-reflecting case, andtwo photomultiplier tubes at both ends. The neutron
detection efficiency and gamma-ray sensitivity of the3
detector were about 80% of that of a standard He neu-7
tron detector and less than 10 under high gamma-ray
field of 100 mSv/hr with a Co-60 source, respectively.

These high performances were again confirmed by threeevaluators from IAEA, LANL, and JRC (Joint ResearchCenter) in a demonstration experiments conducted at
the Facility of Radiation Standard, JAEA. The developed
detector proved to be a promising alternative to the3
conventional He detectors used in nuclear security bythis experiment.
This work was partially supported by the Ministryof Education, Culture, Sports, Science and Technology.

Fig. 5. Photographs showing (a) side and (b) internal viewsof the detector.

J-PARC Annual Report 2014

Materials and Life Science Experimental Facility

17

Muon Science
MUSE (Muon Science Establishment) returned toits normal operation after the proton beam delivery
resumed in February, 2014, following the Hadron Hall
incident in the preceding year. Since then, it was usedin the Inter-University Research Program throughout
the entire 2014A term and part of the 2014B term, andtoward the end of the year on the muon D-line. Unfortunately, the scheduled restart after a short break, inthe beginning of 2015, was deferred by a fire incident at
the MUSE on January 16, 2015, that left the entire Material and Life Science Facility in limbo for a month. The
fire incident was caused by faulty design of a renovatedpower supply for one of the D-line magnets (septupole)that led to overcurrent in a transformer that was newly
added to the original system. Fortunately, the fire wasimmediately extinguished by the MUSE staff, and there
were no casualties or any radiation hazards at the incident site. Although the hardware damage was limited
to the burned transformer, it would take a few months
to restore the D-line.
Meanwhile, MUSE witnessed steady progress inthe facility infrastructure. After years of research anddevelopment, the rotating target was finally rolled
into the primary proton beamline and used for pion/muon production at a beam power of 300 kW startingfrom November, 2014. In Experimental Hall No.1,
the construction work for a part of the S-line and theadjacent S1 area reached its final stage. In November

2014, all components were integrated into the S-line,
subjected to inspection for radiation safety by a third
party organization, and deemed to be ready for beam
operation. The construction of the µSR spectrometer(funded by the “Element Strategy Initiative”, MEXT) was
also nearly completed, waiting for installation to the S1
area.
Coming to the scientific activities, a new antiferromagnetic phase has been identified in a prototypeiron-based superconductor, LaFeAsO1-xH x (LFAO-H),
over a range of unprecedentedly high carrier concentration (x > 0.4). A team of experts on muon, neutron, andSR-x-ray (working together for the “Element Strategy
Initiative” project conducted at the Condensed Matter
Research Center, CMRC) has made a concerted effort
with a group from Tokyo Institute of Technology toshed light on the electronic properties of LFAO-H over
the region of large H content. Here, the µSR techniqueserved to map out the Néel temperature (TN) vs. x in atimely fashion. Subsequent measurements by neutronand SR-x-ray inferred that the magnetic structure wasdifferent from that observed in the low x region, andthat the magnetic transition accompanies structuralchange to a non-centrosymmetric structure (Aem2)
at x = 0.5. These observations suggest that the newphase might be regarded as another “parent” for thesecondary superconducting phase.

Technology Development
During the last year, the technology development
section performed various kinds of technical support
for common issues and maintenance of the neutron
instruments. The first topic was the enhancement of theneutron shielding for the 1 MW operation of J-PARC. In
the summer maintenance period, extra shielding wasadded to the main neutron shielding of BL02 and thebeamstop of BL14 to comply with the surface dosecriteria for the outer surface of instruments (Fig. 6). The
second topic was the construction support for new
instruments. The construction of BL22 (RADEN), whichis the world’s first imaging dedicated instrument at thepulsed-neutron source, and BL23 (POLANO) which ispolarization analysis neutron spectrometer, proceeded
successfully (Fig. 7). RADEN started the beam commis-

sioning by the instrument group and the constructionof POLANO will be completed in the next fiscal year.
The third topic was the construction support for a new
extension building for RADEN. It is located at the west
part of MLF and connected to the second experimental
hall on the first floor (Fig. 8). It is a two-story building andmost of its parts are non-radioactive controlled area. The
experimental controls of RADEN and sample preparations will be done in this building. The fourth topic was
the maintenance of neutron instrument components.
For example, in accordance with the annual maintenance plan, maintenance of the T0 chopper (BL01×1,
BL11×1, BL18×1) and low-speed disk chopper (BL11×2,
BL15×3) were carried out. As an enhancement of theinfrastructure in the MLF experimental hall, common

Materials and Life Science Experimental Facility

J-PARC Annual Report 201418
distribution boards for the operation and test of sample
environment equipment, etc. were installed in the firstand second experimental halls. The construction of the
J-PARC Research building, the so-called User building,
was completed. It is a four-story building. Various kindsof laboratories, such as sample environment equipment(a)room, deuteration rooms for biomaterial and polymer
samples, etc. are arranged on the first floor. The technology development section decided the specificationsof the rooms based on the user requests and contributed to the design.

(b)

Fig. 6. Enhancement of (a) neutron shielding of BL02 and(b) beamstop of BL14.

Fig. 8. Construction of the external building

Fig. 10. Maintenance of BL01 T0 chopper

Fig. 7. Construction of BL22 (RADEN)

Fig. 9. Maintenance of BL15 low-speed disk chopper.

Particle and Nuclear Physics

T2K experiment

12

×10

Run1

Run2

Run3

Run4

Run5 Run6

10
8
6
4
2
0

2010
Dec/31

2012
Jan/01

2012
Dec/31

2013
Dec/31

2014
Dec/31

350
300
250
200
150
100
50
0

Beam Ppwer (kW)Total Accumulated POT for Physics
ν-Mode Beam Powerν‾-Mode Beam Power20

Accumulated # of Protons

The T2K (Tokai to Kamioka) long-baseline neutrinooscillation experiment resumed data accumulation
after about one year of shutdown caused by a problem
in the hadron experimental facility.
Data acquisition commenced on May 26, 2014. The
beam power was upgraded from 230 kW to 320 kW
towards the end of March, 2015. The total numberof protons on target (POT) in the fiscal year 2014 is
20
3.55×10 , and the integrated number of protons
on target since the beginning of the experiment is20
10.12×10 . The history of the beam power and data
accumulation are shown in Fig. 1.

Time

Fig. 1. Total accumulated POT (Protons on Target) and beam
power (kW) of the neutrino beam since the beginningof the experiment in 2010.

Particle and Nuclear Physics

J-PARC Annual Report 201420
1. Anti-neutrino run
In June, 2014, an anti-neutrino beam, as against
a neutrino beam, was created for the first time bychanging the polarity of the current of the magnetic
horns. The first anti-neutrino beam event was recordedin the Super- Kamiokande detector on June 8, 2014. An
exploded view of the event is shown in Fig. 2. The total
number of protons on target in the anti-neutrino run is20
3.12×10 .

Super-Kamiokande IV
T2K Beam Run 560041 Spill 2343442
Run 72739 Sub 623 Event 150503351
14-06-08:12:21:36
T2K beam dt =2820.7 ns

Inner: 1355 hits, 4920 pe
Outer: 3 hits, 2 pe
Trigger: 0x80000007
D_wall: 312.3 cm
Evis: 445.6 MeV

Charge(pe)>26.7
23.3-26.7
20.2-23.3
17.3-20.2
14.7-17.3
12.2-14.7
10.0-12.2
8.0-10.0
6.2- 8.0
4.7- 6.2
3.3- 4.7
2.2- 3.3
1.3- 2.2
0.7- 1.3
0.2- 0.7< 0.2
270
0 mu-edecays

216
162
108
54
0
0

500

1000

1500

2000

Times (ns)Fig. 2. Exploded view of the first anti-neutrino beam event
observed in the Super-Kamiokande detector. The event
was recorded on June 8, 2014.

2. Analyses
Constraints on the neutrino oscillation parameters
were analyzed using the data recorded until summer
2013. Appearance studies for electron neutrinos
and disappearance studies for muon neutrinos werecombined, and more elaborate analyses were performed.
The results shows hints towards normal mass hierarchy
with a CP-violation phase δCP~–π/2. Details are reported
in the Research Highlights (see Vol. 1).
Other significant aspects of the study included
measurements of neutrino cross-sections etc. Results
for some interaction modes have been published in
the fiscal year 2014. These are the inclusive νμ charged
current cross section on iron and hydrocarbon [1], theneutral current interaction with oxygen [2], and theinclusive νe charged current cross section on carbon[3].
A search for sterile neutrinos was performed using
the ND280 detector. No positive signal indicating sterile
neutrinos were detected, and new constraints on theoscillation parameters were obtained [4].
3. Facility upgrade and maintenanceReplacements of all the three magnetic horns, initiated in November, 2013, were successfully completed
in April, 2014, with the replacement of the most
upstream magnetic horn. Since the replacements had
to be conducted in a highly radioactive environment,
all operations were executed using a remote control

from a crane operation room isolated by a shield wall.
The most upstream magnetic horn suspended by acrane is shown in Fig. 3. These new horns are expected
to be functional for several years.

Fig. 3. The most upstream magnetic horn suspended by acrane, proceeding for a replacement.

J-PARC Annual Report 2014

Particle and Nuclear Physics

21
Power supplies for the normal conducting magnets
in the primary proton beam line were replaced withnew ones. The old power supply system was mostly
constructed in 1980's, requiring immense efforts formaintenance. The replacements were completed in
September, 2014. The new system has been operating
successfully since October, 2014. Normal conducting
magnets and their new power supplies are shown in
Fig. 4.

References[1] K. Abe et al. (T2K Collaboration) Phys. Rev. D90, 052010 (2014).
[2] K. Abe et al. (T2K Collaboration) Phys. Rev. D90, 072012 (2014).
[3] K. Abe et al. (T2K Collaboration) Phys. Rev. Lett. 113, 241803 (2014).
[4] K. Abe et al. (T2K Collaboration) Phys. Rev. D91, 051102 (2015).

(reprint from KEK annual report)
Fig. 4. (top) Normal conducting magnets of the primary proton
beam line, and (bottom) their new power supplies.

Hadron and Nuclear Physics
In spite of there being no operations performedat the Hadron Experimental Facility (HEF) in JFY 2014
owing to the radiation incident that occurred in May
2013, some results of the experiments performed
in 2012 were published [1,2,3]. Here, we present the–results of the E27 experiment, which aims to find a K pp
bound system [3].
Kaonic nuclei are exotic nuclei in which K-mesons
are bound in nuclei by the strong interaction. Their existence is a key issue in developing an understanding of
the K N interaction in vacuum, a nuclear medium, andhigh-density nuclear matter, such the core of neutron–stars. Among them, the K pp bound state composed–of K and two protons could be the simplest one, if itexisted. However, the predicted binding energies and–widths of the K pp state strongly depend on the K N
interaction and calculation methods.

Fig. 1. Schematic of the production and decay reactions. K–pp
(denoted by X) is expected to be formed by the D (“p n”)+++ π → K + X reaction and is expected to decay to p +–p + π + γ.

Particle and Nuclear Physics

J-PARC Annual Report 2014

22
(a)
d−
σ 2/dΩ/dM 2ﾟ>14ﾟ(Lab) [μb/sr/(15 MeV/c2)]–

Experimental situation for the K pp bound state is
not conclusive at present; the FINUDA experiment for–6712
the stopped K absorption on Li, Li, and C [4] andthe DISTO experiment for the exclusive reaction of+
pp→K Λp at 2.85 GeV [5] reported their observations of–
the K pp bound state. However, no signal was observed+ –in the inclusive spectrum of the γd→K π X reaction at
Eγ = 1.5–2.4 GeV at LEPS [6]. It is important to obtain
new experimental information for different reactions.
The J-PARC E27 experiment was performed using++
the d(π , K ) reaction at 1.69 GeV/c with the Superconducting Kaon Spectrometer (SKS) at the K1.8–
beamline of the HEF. In this reaction, K pp is expected
to be formed through Λ(1405) production and the––
produced K pp is expected to decay to p+p+π +γ in
the final state (Fig. 1). Thus, to improve the signal-tobackground ratio, high-energy protons in the final state
were also measured in coincidence with 6 sets of arange counter array (RCA), which were installed arounda liquid D2 target and cover the angular range from 39˚
to 122˚ in the laboratory frame.
In the detailed analysis, we distinguish the final–
0
0–
states as follows: (i) Λp, Λ →pπ , (ii) ∑ p, ∑ →Λg →pπ γ,
and (iii) YpN →ppππ. Figure 2 shows a missing-mass
distribution for two-proton coincidence events of the0∑ p final state (ii) with the acceptance correction, which–shows the K pp-like structure. By fitting the spectrumwith a relativistic Breit–Wigner function, the obtainedmass and width are
+17
+21
2
2275 –18 (stat.) –30 (syst.) MeV/c and
+87
+66
2
162 –45 (stat.) –78 (syst.) MeV/c , respectively.
–
The corresponding binding energy of the K pp
+18
+30
2
system is 95 –17 (stat.) –21 (syst.) MeV/c , ~10 times
higher than the normal binding energy.

0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0

2

2.1

2.2

2.3

2.4

2.5
2.6
MMd [GeV/c2]++

Fig. 2. Missing-mass spectrum of the d(π ,K ) reaction for0
two-proton coincidence and the ∑ p decay branch
events with the acceptance correction. The red curve
is a fitting with the relativistic Breit–Wigner function.
–

Another experimental investigation on the K pp
system is underway at the HEF. The E15 experiment–at the K1.8BR beamline aims to detect K pp in both–production and decay channels. K pp is produced via
3–
the He(K ,n) reaction at 1.0 GeV/c, measured by a beam–
spectrometer and neutron detector wall, and its decay, K–
pp → Λp → π pp, is detected by the cylindrical detector
3system surrounding a liquid He target. As reported in
the Annual Report in JFY 2013, no significant peak struc–ture, but some yields below the K + p + p thresholdwere observed in 1% of data obtained before theincident, which cannot be explained by the detector
resolution or known processes [7]. Further collection ofdata is planned in 2015 after operations at the HEF are
resumed.
References[1] M. Moritsu et al., Phys. Rev. C 90, 035205 (2014).
[2] Y. Ichikawa et al., Prog. Theor. Exp. Phys. 2014, 101D03(2014).
[3] Y. Ichikawa et al., Prog. Theor. Exp. Phys. 2015, 021D01(2015).
[4] M. Agnello et al., Phys. Rev. Lett. 94, 212303 (2005).
[5] T. Yamazaki et al., Phys. Rev. Lett. 104, 132502 (2010).
[6] A.O. Tokiyasu et al., Phys. Lett. B 728, 616 (2014).
[7] J-PARC E15 Collaboration6T. Hashimoto et al., Prog. Theor.
Exp. Phys. 2015, 061D01 (2015).
(reprint from KEK annual report)

J-PARC Annual Report 2014

Particle and Nuclear Physics

23

Kaon Experimentconsistent with the numbers of expected background
events (in red), based on Monte Carlo simulation
studies. The background level in the signal region was
expected to be 0.36±0.16, mainly due to interactionsof neutrons with the calorimeter, and one event wasobserved. Detailed studies are being conducted to understand and suppress the background level further.
The KOTO collaboration is going to publish theresults, resume the collection of physics data, andconduct beam-based background studies when the
HEF restarts.

FB Hinemos NCC MB BCV CV LCV CC03 OEV CC04

CC05

CC06 BHCV

BHPV

BHTS

2
1
0
[m]

KL beamdecay volume(vacuum)yConcreteiron shieldCsI calorimeter
0

2

4

6

8

10

12

14

x

z

16 [m]

Fig. 1. KOTO detector system in 2013. The beam comes infrom the left side.

Rec. P T [MeV/c]Experimental study of K-meson (kaon) has a long
history since its discovery in 1947. The decay of long0
lived neutral kaon (KL) into a neutral pi meson (π ) and a0pair of neutrinos, represented as KL→π νν, is known to
be a rare and precious decay mode in particle physics.
The Standard Model (SM) predicts the branching fractionof this decay mode very precisely, once in forty billion
KL decays. New sources of symmetry breaking that can
explain the matter-antimatter asymmetry in the universe
may be revealed by examining this decay mode. On theother hand, for experimentalists, detecting this decay
mode is a challenge because only two photons from the0
π decay are observable.
The J-PARC E14 KOTO experiment was proposed0
in 2006 to study the KL→π νν decay. In the Hall of the
Hadron Experimental Facility (HEF) at J-PARC, a newneutral beamline was built for KOTO in 2009, and 2716
undoped CsI crystals were stacked for the KOTO calorimeter in 2010. The crystals and phototubes were theones that had been used in the KTeV experiment at
Fermilab, USA, in 1990’s. For detecting extra particles
from KL decays, charged-particle and photon vetocounters were built and were installed to the inside of
the vacuum vessel of the KOTO detector. Veto counterswere also placed downstream of the vessel in order todetect particles escaping along the beamline. A crosssectional side view of the detector system is shown in
Fig. 1.
After commissioning the trigger and data acquisition system, the first physics run was initiated in May,
2013; data for one hundred hours, corresponding to18
1.6 × 10 protons on target, were recorded before theradioactive material leakage at the HEF. Preliminary
results of the analysis were reported [1] at the CKM2014
International Workshop. Figure 2 shows the scatterplot of the reconstructed transverse momentum (Rec.
PT ) versus decay vertex position (Rec.z) of the observed0
π ’s after imposing all the selection criteria, including
0
extra-particle vetoes. The KL→π νν decay should appear
as an event with a finite Rec.PT, corresponding to themomentum taken away by two neutrinos, and with
Rec.z in the decay volume. The dark box in the plot
had been masked during the analysis; the inner box
is the pre-determined signal region. The numbers of
the events around the masked region (in black) were

Prel
500
4
im in
Observedary 3.5450
400 Expected
3
1
0
350
0.17±0.12 0.033±0.0272.5
300
250
2
0
200
1.5
0.026±0.025
150
1
100
87 9
0
0.5
87 7.24±0.52 0.0018±0.001650002000 3000 4000 5000 6000
Rec. z [mm]Fig. 2. Scatter plot before “opening the box”, from the analysisof the 2013 data.

Reference[1] K. Shiomi (for the KOTO collaboration), arXiv:1411.4250,
to appear in the Proceedings of the 8th International
Workshop on the CKM Unirarity Triangle (CKM 2014), Vienna, Austria, September 8-12.
(reprint from KEK annual report)

Particle and Nuclear Physics

J-PARC Annual Report 2014

24

COMET
Coherent Muon to Electron Transition (COMET)
is an experiment that aims to search for the muonto-electron (µ-e) conversion in muonic atoms, which
also violates the lepton-flavor conservation, using an
intense pulsed-muon beam generated at J-PARC. In
2014 the COMET group has moved forward preparationof the experiment significantly. The COMET experimentuses a large solenoid magnet with a gradient magnetic
field, called “capture solenoid”, surrounding the primarytarget in order to collect produced secondary particles
such as pions and muons. Then those particles aretransported to the experiment area by a curved solenoid with a 90-degree bend, called “transport solenoid”,
in which momentum and charge of secondary particles are selected using a collimator located at the exit.
Fabrication of these magnets was initiated in 2013 andcontinued in 2014. In March 2015 construction of thetransport solenoid was completed. The magnet wasthen transported to J-PARC and installed to the position in the experiment area after assembling with aniron return yoke as shown in Fig. 7. R&D of the detector
has also made significant progress in 2014. Prototype
detectors for electron momentum and energy measurements to be used in beam background study and inphysics measurement in future have been constructed
and tested using cosmic-ray practical performance. In
calorimeter R&D, LYSO (Cerium doped Lutetium Yttrium

Orthosilicate) is selected as the crystal material for electron energy measurement owing to its better energy
resolution. In addition to these R&D, fabrication of themain detector for COMET physics measurement in thest
1 stage of the experiment, cylindrical drift chamber(CDC), has started at the initiative of Osaka university
group with help of KEK [2]. Stringing of 20,000 wires
will be continued for a half year in 2015 before detector
commissioning. Construction of all these detectors
is based on the technical design of the experimentsummarized in 2014 [3]. The collaboration has grown in
2014. New members from Belarus and Korea have been
approved to join the collaboration.
References[1] New constraint on the existence of the µ+→e+γdecay, J.
Adam and others (MEG collaboration), Phys. Rev. Lett.
110, 201801, 2013.
[2] http://www2.kek.jp/ipns/news/comet-cdc-carry-in/index.html[3] COMET Technical Design Report, COMET collaboration,
submitted to the J-PARC PAC(reprint from KEK annual report)

Fig. 1. Layout of the COMET Phase I and assembling of the COMET transport solenoid with the iron return yoke (right)

J-PARC Annual Report 2014

Particle and Nuclear Physics

25

Muon g-2 / EDM
The experiment aims to measure the muon anomalous magnetic moment (g-2) with 0.1 ppm precisionand the electric dipole moment down to a sensitivity of–21
10 e • cm level. R&D is in progress to realize a novel experimental technique of ultra-slow muon source, muon
acceleration, injection, storage magnet, and tracking
detector. Major achievement on a large enhancementof the muonium emission was published in Ref. [1], andthe results were confirmed by follow up experiment at
J-PARC (more details are reported in the research highlights, see Vol.1).
Next milestone is a demonstration of muon acceleration. Simulation studies on the muon acceleration
by a Radio Frequency Quadrupole (RFQ) linac confirmed that muons are accelerated with high efficiency.
A test of muon acceleration using negative muonium
ions was developed at MLF.
The experiment requires a novel three-dimensional
beam injection to the muon storage magnet. Design oftransport beamline to the storage magnet was developed. A demonstration of the spiral injection schemeby using low-energy electron beam is being prepared.

Precision magnetic-field measurement is one of theimportant technologies to achieve the required precision. Improvements were made to a system of the magnetic-field measurement by using nuclear magnetic
resonance (NMR) to reach resolution of 0.017 ppm level.
Finally, positrons from stored muon decay aremeasured by a silicon-strip tracking detector. Test silicon-strip sensors were developed and evaluated withpositron beam, confirming a good signal-to-noise ratioof 20. A full scale prototype of the frontend ASIC wasdeveloped.
A technical design to realize this experiment withthe expected precision beyond the previous experiment was developed. The collaboration started preparation of a Technical Design Report.

Reference[1] Prog. Theor. Exp. Phys. 091C01, 2014(reprint from KEK annual report)

Particle and Nuclear Physics

J-PARC Annual Report 2014

26

2

JSNS (J-PARC E56) Experiment
JSNS2 (J-PARC Sterile Neutrino Search at J-PARC
Spallation Neutron Source) is a new stage-1-approved
experiment, which aims to confirm or refute the existence of a sterile neutrino [1]. Sterile neutrinos do nothave weak interactions, and their existence proves thephysics beyond the standard model. They are predictedby some theories and are indicated by some pastexperiments, but their existence so far has never been
confirmed by the experiments with small systematic
uncertainties. Fig. 1 shows a bird’s-eye view of the MLF
2building and a JSNS detector location candidate , thethird floor of the MLF.

Detector@3rd ﬂoor
(50 ton f iducial,–24m baseline)

Neutron Hg target(& neutrino source)

3GeV proton

Fig. 1. A bird’s-eye view of the MLF building and the detector
location candidate (red box).

A large number of anti-muon neutrinos are createdby the decay-at-rest process of muons at the mercury
target at the MLF, and there could be oscillated signals
from the anti-muon neutrinos to anti-electron neutrinos
within the baseline of 24 m from the target to thedetector, if neutrino oscillations with sterile neutrinos
exist. The signals are detected by the 50 tons of liquid
scintillator inside the detector using Inverse Beta Decay
process.
In 2014, we measured the background rate and theenergy spectra of the backgrounds at the candidate
site to examine the feasibility of the experiment [2]. Thismeasurement was performed using a 500 kg plastic
scintillator borrowed from the LEPS2 experiment. Fig. 2
shows the result of the background measurement, witha 2D histogram of energy and the timing of the backgrounds.

Point2
102

-4

10

10-5

10
10-6

1

10-7

0

2000

4000

Fig. 2. Event timing (horizontal axis, ns) and energy (verticalaxis, MeV) of the measured background at the detector candidate location. The rate is shown as number ofbackground events / spill.

As shown in Fig. 2, there are a lot of background
events around the proton bunch timing from 0 to1000 ns, however, the number of the background isdrastically reduced with the timing and energy windowof 1<T<10µs from the beam time and 20<E<60MeV,
2
which JSNS experiment uses to detect the anti-electron neutrinos because of the muon long lifetime andanti-neutrino energy from the muon decay-at-rest. The
measurements proved that the backgrounds inducedby the beam will not be an issue for the real experiment. The backgrounds from cosmic-rays could also beplaced under control.
2After obtaining the stage-1 approval, the JSNS
collaboration is intensively performing the R&D for thedetector to write the Technical Design Report.

References[1] M. Harada et al, arXiv:1310.1437[2] S. Ajimura et al, Prog. Theor. Exp. Phys. 2015 6, 063C01(2015)

Cryogenics Section

Overview
The Cryogenics Section supports scientific activities in applied superconductivity and cryogenic engineering, carried out at J-PARC. It also supplies cryogen
of liquid helium and liquid nitrogen. The support work
includes the operation of the superconducting magnet
system for the neutrino beamline, and support for theconstruction and operation of superconducting magnet systems for the muon beamline at the Materials andLife Science Experimental Facility (MLF) and the magnets at the Hadron Experimental Facility. It also actively
conducts R&D works for future projects at J-PARC.

Cryogenics Section

J-PARC Annual Report 2014

28

Superconducting Magnet System for the T2K beamline
The Cryogenics Section operates the superconducting magnet system for the T2K neutrino beam line.
The operation history in FY 2014 is summarized in Table 1.
The refrigeration system operated steadily without any

troubles, such as a compressor trip during the run time,observed in previous years and the operation in FY2014
records the longest operation time as shown in Fig. 1.

Table 1. Operation history of the superconducting magnet system for the J-PARC neutrino beamline.
2014
April

2015
May

June

July

Aug.

Sept.

Oct.

Nov

Dec.

Jan.

Feb.

Operation
4/1−4/29, 5/7−7/2

10/7−12/22

Maintenance

7000

Time (Hours)

6000
5000
4000
3000
2000
1000
0

FY2009 FY2010 FY2011 FY2012 FY2013 FY2014

Fig. 1. Annual operation time of the cryogenic system for the J-PARC neutrino beamline

1/9−4/13Mar.

J-PARC Annual Report 2014

Cryogenics Section

29

Superconducting magnet system for the muon U-line at MLF
The Cryogenics Section supports the maintenanceof the intense ultra-slow muon beam line (U-line) at
MLF. During the long shutdown in FY2013, it was foundout that a radiation shield foil at the upstream end of

the curved solenoid had disappeared for unknown reason, so the head of the curved solenoid was not cooled
down enough for magnet excitation. In the summer of2014, the problem has been fixed.

Fig. 2. Repair works on the radiation shield foil at the upstream end of the beam bore of the superconducting curved
solenoid at the MLF U-line.

Superconducting magnet system for the muon D-line at MLF
One of the major contributions of the Cryogenics
Section was the recovery of the superconducting
magnet system of the MLF muon D-Line after the Great
East-Japan Earthquake. The magnet and the refrigeration system were damaged due to the earthquake,and the superconducting magnet and the helium
compressor had to be replaced. The section contributed to the fabrication of the magnet and the reconstruction of the refrigeration system. The recovery of
the refrigeration system, including the installation ofa new helium compressor (Fig. 3), was successfullycompleted during the summer shutdown of 2014.
The commissioning was finished in September, 2014,
without any serious problems. The superconducting
magnet was fabricated and delivered in March, 2015.
The replacement of the superconducting magnet has
been planned for the summer shutdown of 2015.

Fig. 3. New helium compressor for the MLF muon D-Linemagnet system.

Cryogenics Section

J-PARC Annual Report 2014

30

Superconducting Kaon Spectrometer (SKS)The Cryogenics Section supports the Superconducting Kaon Spectrometer (SKS) operation at the
Hadron Experimental Hall. The SKS suspended operation since the accident at the Hadron Experimental Hallin 2013. After investigation and reconstruction of theexperimental hall, the SKS resumed operation in thefall of 2014 and the physics experiments using the SKS
were performed safely.

Superconducting magnet system for COMET
The construction of the COMET Phase-I experimentstarted in 2013. The Cryogenics Section is involved in
the COMET experiment with the task to construct thesuperconducting magnet system. Some of the solenoid
coils for the Pion Capture Solenoid with radiationhard resin and insulation were wound in FY2014. The
Muon Transport Solenoid (Fig. 4) was delivered to theexperimental hall at the Hadron Experimental Facility andinstalled on the cradle.

Fig. 4. Muon Transport Solenoid delivered to the J-PARC Hadron Experimental Facility.

Superconducting magnet system for TREKThe TREK/E36 experiment for the measurementof lepton flavor universality violation is planned at theK1.1-BR experimental area in the Hadron Experimental
Hall. The superconducting toroidal magnet and a helium
cold box (TCF50) that had been used in the KEK E246
experiment in 1990, were used again in this project. The
cryogenic system had several serious problems, which
affected the control system and even caused leakageof the 4 K helium pipe. Along with the repair works to
fix such issues, the Cryogenics Section also provides
system construction for the Hadron Experimental Facility.
Figure 5 shows the transportation and installation workof the superconducting toroidal magnet and the coldbox. After finishing the construction, we confirmed thatthe cryogenic system did not have any problems byperforming the cooling and excitation test.

Fig. 5. Transportation of the superconducting toroidal magnet (left) and the system installation work (right).

J-PARC Annual Report 2014

Cryogenics Section

31

Cryogen Supply and Technical Support
The Cryogenics Section provides liquid helium
cryogen for physics experiments at J-PARC. The usedhelium is recovered by the helium gas recovery facility,
which is provided and operated by the Cryogenics
Section. Figure 6 summarizes the liquid helium supply
in FY 2014. Until June, 2014, the helium gas was liquefiedin collaboration with the Accelerator Division using
the helium liquefier owned by the Accelerator Division.
In the fall of 2014 the liquefier constructed and maintained by the Cryogenics Section started to provide
liquid helium to the users.

Liquid nitrogen was also supplied to the users
for their convenience and its amount during the
FY2014 period is summarized in Fig. 7. Liquid nitrogenhas been regularly provided to the Radiation Safety
Section for operating a gas chromatograph. The
commissioning of the refurbished refrigeration
systems at MLF and Hadron Experimental Facility
required liquid nitrogen in September and December.
Liquid nitrogen was also supplied for the magnet R&D
in February, 2015.

6000
5000

Supply (L)

4000
3000

Cryo. S

18,000SKS (Hadron)

16,000

Muon (MLF)

14,000

Neutron (MLF)

12,000

Cumul.

10,000
8,000

2000

6,000
4,000

1000

Cumultive Supply (L)20,000

2,000

0

20

14

Ap
r.
M
ay
Ju
n.
Ju
l.
Au
g.
Se
p.
Oc
t.
No
v.
De
20 c.
15
Ja
n.
Fe
b.
M
ar
.

0

Fig. 6. Liquid helium supply at J-PARC from April, 2014, to March, 2015.

45,0008000

OthersSupply (L)7000

Cryo. S

6000

Hadron5000

MLF

40,00035,00030,00025,000

4000

Rad.S

20,0003000

Cumul.

15,0002000

10,000

1000

5,000

Ju
l.
Au
g.
Se
p.
Oc
t.
No
v.
De
20 c.
15
Ja
n.
Fe
b.
M
ar
.

M

Ap
14
20

ay
Ju
n.

0

r.

0

Cumultive Supply (L)9000

Fig. 7. Liquid nitrogen supply at J-PARC from April, 2014, to March, 2015.

Cryogenics Section

J-PARC Annual Report 201432

R&D for the future J-PARC project: New muon g-2/EDM
and muonium HFS
The g-2/EDM project aims for the precise measurement of the anomalous magnetic moment and theelectric dipole moment of muons. This experimentis planned at the H-Line of the muon science facility(MUSE) in MLF. A superconducting solenoid with highfield homogeneity, better than 1 ppm locally, plays avery important role as a muon storage ring. The design
study of the magnet is proceeding in collaboration
with IPNS and the Cryogenics Science Center. Technicaldesign report, TDR, was being written to be submitted
in May, 2015.
A muonium hyperfine structure measurement,
called MuSEUM experiment, using the same beam line as
the g-2/EDM project has also been proposed by a groupof the Institute of Materials Structure Science of KEK. In
the experiment, the energy state transition in muonium
will be observed under a static magnetic field with local
homogeneity of 1 ppm. A superconducting magnet for
an MRI system has been preliminary tested at the J-PARC
Neutrino Utility Building No.1 from January to March,
2015, as shown in Fig. 8. After cooling down to 4.2 K fromroom temperature, the magnet was energized up to
1.5 T. In the magnetic field shimming test, the field
homogeneity around within 30 cm DSV (diameter
spherical volume) could be successfully improved from

860 ppm p-p to 3.88 ppm p-p. The next shimming
test is planned for April, 2015, at 1.7 T required for the
MuSEUM experiment.

Fig. 8. Magnetic field shimming test at J-PARC.

J-PARC Annual Report 2014

Cryogenics Section

33

Information System

Statistics of Network Utilization
Since 2002 the J-PARC network infrastructure,
called JLAN, has been operated independently fromKEK LAN and JAEA LAN in terms of logical structure
and operational policy. In 2014, the total number ofhosts on JLAN exceeded 4100, which was an increaseof 106% compared to the last year. The growth curveof edge switches, wireless LAN access points andhosts (servers and PCs) connected to JLAN are shownin Fig. 1. Figures 2 and 3 show the network utilizationof the internet from/to JLAN. The bandwidth capacity
for the internet through the Japan Science Information
Network (SINET) is 10 Gbit/sec, which allows enoughextra activity. JLAN has not only been used for internal
communication in the J-PARC and external networking
through the internet but it also played an importantrole in the transfer of experiment data from the Tokaiarea, where the main J-PARC facilities were built, to the
Tsukuba area, where the major computer resources
for data analysis are located. Figures 4 and 5 show thestatistics of data transfer between the two sites. The
bandwidth capacity for the connection is currently
1 Gbit/s x 8 = 8 Gbit/s and the usage level has been
approaching half of the limit in 2 hours’ average andtwo-thirds in 5 minutes’ peak transfer rate, especiallyduring the period when the Hadron facility was runningin 2013 (Fig.6). The figure also shows that after thatyear the major network traffic output from J-PARC wassuspended due to the J-PARC temporary shut-downfollowing the incident at the Hadron Experimental
Facility on May 23.

Information System

J-PARC Annual Report 2014

5000

Edge Switches
WLAN Access Points
No. of hosts

200
150

4000
3000

14
20

13
20

12
20

11
20

10
20

09
20

08
20

20

20

20

20

20

FY

20

07

0

06

0

05

1000

04

50

03

2000

02

100

Fig. 1. Number of hosts, edge SW and wireless AP on JLAN.

GBit/s

1.5

2h average

5m peak

1.0
0.5

5

M

Fe

ar

b-

-1

15

15
n-

14

Ja

No

De

v-

c-

14

4
t-1
Oc

pSe

Au

Ju

g-

14

14

4
l-1

14
nJu

ay
M

Ap

r-1

-1

4

4

0.0

GBit/sFig. 2. Network traffic from JLAN to the internet.

2h average

0.4

5m peak

0.2

5

M

Fe

ar

b-

-1

15

15
n-

14

Ja

No

De

v-

c-

14

4
t-1
Oc

Se

Au

p-

g-

14

14

4
l-1
Ju

14
Ju

n-

-1
ay
M

Ap

r-1

4

4

0.0

0.5
0.4
0.3
0.2
0.1

5
-1

15

ar
M

Fe

Ja

b-

n-

15

14
De

vNo

c-

14

4
Oc

pSe

t-1

14

14
Au

g-

4
Ju

l-1

14
nJu

-1
ay
M

r-1
Ap

4

2h average
5m peak

4

GBit/sFig. 3. Network traffic statistics from the internet to JLAN.

Fig. 4. Network traffic statistics from Tokai site to Tsukuba site.

-1
5
ar

b15
Fe

Fig. 5. Network traffic statistics from Tsukuba site to Tokai site.

M

n15
Ja

c14
De

14
vNo

4
t-1
Oc

14
p-

14
gAu

l-1

4

5m peak

Ju

14
nJu

4
-1
ay
M

r-1

4

2h average

Se

0.5
0.4
0.3
0.2
0.1
0
Ap

GBit/sSW and WLAN
AP

250

No. of Hosts
connected to JLAN

34

J-PARC Annual Report 2014

Information System

35

GBit/s6

To Tsukuba peak
From Tsukuba peak
To Internet peak
From Internet peak

420

FY2009FY2010FY2011FY2012FY2013

FY2014

Fig. 6. Peak network traffic for the recent years.

New network service “User LAN” for public J-PARC users
Since 2009 J-PARC has offered a Guest network(GWLAN) service. The GWLAN is a wireless LAN internet
connection service for short-term visitors available
in almost all J-PARC buildings. In the end of 2014, anadditional new network service called User LAN has
started. In using the GWLAN users are required toreceive beforehand a password from the J-PARC Users
Office. In the new service the users are authenticated by
the same ID and password of the User Support System,
which is also used for dormitory reservation and so on.
Figure 7 shows the usage statistics of GWLAN and UserLAN.

GWLAN + UserLAN

400
User LAN

300

GWLAN

200
100

-1
5
ar

b15
Fe

M

n15
Ja

14
c-

De

4

14
vNo

t-1
Oc

4

p14
Se

g1
Au

4
l-1
Ju

14
nJu

-1
4
ay

M

Ap
r-1

4

0

Fig. 7. Use trends of GWLAN and User LAN.

Statistics of Computer Resources Utilization
Though J-PARC does not have its own computing
facility for physics analysis, since 2009 the KEK centralcomputer system at the KEK Tsukuba site has been
mainly used for that purpose (the system was upgradedin 2012). Currently computer resources of 25,000
SPECint06 computing power, 1.2 PBytes disks and 5
PBytes tapes were assigned to J-PARC (Table 1).
At the Neutrino (T2K experiment) and Hadronexperiments, the data taken in the J-PARC experimental
hall will be temporarily saved at the Tokai site andthen promptly transferred to, stored and analyzed at
the system in Tsukuba. The storage of the system will
also be utilized as a permanent data archive for the
Neutrino, Hadron and MLF experiments. Figures 8 to 12
show the utilization statistics of the computer resourcesin 2014. The main users who used the CPU and thestorage constantly were from the Hadron experimentgroup (Koto). The MLF group also started to store data
to tapes on the system.

Information System

J-PARC Annual Report 201436
Table 1. Assigned computing resources to J-PARC activities in the KEK central computing facility.

CPU

25,000 SPECint06

RAID Disk

1,200 TB

Tape

5.0 PB

100
Usage Ratio (%)

80
60

Other KEK use

J -PARC Hadron

40

J -PARC MLF

J -PARC neutrino

200Apr-14 May-14 Jun-14

Jul-14Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Jan-15

Feb-15 Mar-15

1.0

2,000

0.8

1,500

HadronNeutrino
MLF

0.6
0.4

1,000
500

0.2

Fig. 9. Disk usage statistics.

14
FY

20

13
FY

20

12
FY

20

11
FY

20

10

1,200
disk total
hadronneutrino
MLF

1,000

1.0

Hadron0.8

Neutrino

0.6

MLF

0.4

800
600
400

0.2

Fig. 11. Tape library usage statistics.

20
14

FY

20
13

FY

20
12

FY

20
11

FY

20
10

FY

20
09

0

FY

Feb-15Mar-15Jan-15

Dec-14

Nov-14Oct-14Aug-14
Sep-14Jul-14Jun-14Apr-14May-14200
Mar-14

PByte

20

Fig. 10. Disk usage statistics.

1.2

0.0

FY

09
20

Feb-15Mar-15Jan-15

Dec-14

Nov-14Oct-14

Sep-14Aug-14Jul-14Jun-14May-140
Apr-140.0

tape total
hadronneutrino
MLF

FY

PByte

Fig. 8. CPU usage statistics.

Fig. 12. Tape library usage statistics.

Transmutation Studies

Overview
The Transmutation Section has been working on
developing the Transmutation Experimental Facility(TEF) in J-PARC for R&D on volume reduction and mitigation of harmfulness of high-level radioactive waste byusing accelerator-driven systems (ADS). In April 2014,
the Japanese Cabinet endorsed a “Strategic Energy
Plan”, the first Japanese comprehensive and systematicenergy policy after the Great East Japan Earthquake in2011. Promotion of nuclear transmutation technology
development using accelerators was mentioned for the
first time in the Japanese energy policy. The supportive
message contained in this plan encouraged us to continue further with the construction of TEF. In responseto the plan, the human resources involved in the TEF
program were reinforced by increasing the numbers of
the regular staff and staff concurrently work for the TEF
program, from 7 and 6 as of April, 2014, to 12 and 9 one

year later, respectively.
On July 10-11, 2014, the first TEF Technical Advisory
Committee (T-TAC), which was one of technical advisorycommittees under the J-PARC International Advisory
Committee, was launched. The discussed topics
included: (1) strategy to realize transmutation technology, (2) readiness of the ADS Target Test Facility(TEF-T) construction and (3) validity of the Transmutation
Physics Experimental Facility (TEF-P) concept from atechnical point of view. The T-TAC endorsed our R&D
activities for the TEF construction in general, and also
gave us many valuable recommendations.
In July and August, the 6th and 7th meetings ofthe national review working party (WP) for partitioning
and transmutation technologies using ADS were held
following five meetings in 2013. The WP discussed
the progress in solving the technical issues in the TEF

Transmutation Studies

J-PARC Annual Report 201438
construction, international cooperation and humanresource development, and gave us some positive
comments. But the WP did not recommend yet starting
the TEF construction.
As a result of the increased funding for the TEF
program, several new experimental devices were fabricated in FY2014, such as a TEF-T Target Mockup Loop, a
High-temperature Material Corrosion Test Loop and an
oxygen concentration measurement device to establish

liquid lead-bismuth eutectic (LBE) handling technology
for TEF-T, and mockup devices for minor actinide (MA)handling technology for TEF-P. Typical R&D results
obtained by using these new devices as well as existing
experimental devices will be introduced later. The
conceptual design of various systems and buildings for
TEF-T and TEF-P also progressed, and will be also introduced later.

Design of Transmutation Experimental Facility
Improvement of the nuclear safety regulations
The nuclear safety regulations specified by the
Nuclear Regulation Authority (NRA) of Japan were reexamined fundamentally after the serious accident at the
Fukushima-Daiichi Nuclear Power Plant in March, 2011.
In the case of reactor facilities, the countermeasuresagainst disaster, such as a big earthquake, a tsunami,
a volcano eruption and so on, were enforced drastically. The nuclear security requirements for facilities
using nuclear fuel materials were also enforced. These
regulations for safety, security and the proper safeguards are fully applied not only at nuclear power plants
but also at fuel cycle facilities and research reactors.
Since TEF-P will be a new facility, which includes a criticalassembly with highly enriched uranium, the regulations
will be applied strictly.

Rearrangement of the facility layout
The facility layout of TEF was re-arranged according
to the new safety regulations. To comply with the nuclear
security requirements, TEF-P has to be surrounded
by a multi-layered barrier. The access to TEF-P will becontrolled strictly and differ completely from that to theradiation facility TEF-T. In the previous facility design,
the two TEF buildings were to be located nearly contiguous and tangled by a beam line for TEF-P as shownin Fig. 1. Because it is also required to protect the TEF-P
building from flooding caused by a tsunami, the heightof TEF-P site has to be at almost the same level as the
J-PARC LINAC facility. In addition, since the earthquake
energy for seismic analysis was also upwardly revised,
the installation of man-made rock was proposed as abasis of the fundamental structure for TEF-P. Figure 2
shows a tentatively revised facility layout of TEF.

Fences for Protected Area

TEF-P

TEF-T

Fig. 1 Original TEF layout.

Gate

Fence for the Limited Access Area
Fences for the Protected Area

TEF-P

TEF-T

Gate
Fig. 2 Revised TEF layout.

J-PARC Annual Report 2014

Transmutation Studies

39

Design of the TEF-T spallation target
To accelerate the TEF construction, a conventionallayout of the TEF-T spallation target system insteadof the annular-tube type structure was selected. The
trolley-mounted type primary circuit was also selectedreflecting the experiences from the mercury target in
J-PARC Materials and Life Science Experimental Facility(MLF). However, there are many differences between
the MLF mercury target and the TEF-T LBE target. The
biggest difference is between the operation temperaturesof both targets. Because the main research objectiveof TEF-T is to prepare an irradiation database for future
ADS design, the maximum LBE temperature exceeds
450°C even though there are no spallation targets
operated above 500°C. To ensure the soundness of
the LBE target loop, a TEF-T Target Mockup Loop to be
operated without a proton beam was manufactured,and is ready for operation. Further details of the loop
will be discussed in another section of this report.

Design of TEF-P
As mentioned in the previous section, the facility
layout of TEF-P including the structure of the building
and the beam transport line were revised to satisfy
the regulations for nuclear security and the proper
safeguards. A ground survey will be performed in fiscal
year 2015 to obtain geological data needed to evaluate
the strength of the TEF-P building.
The inner pressure of an MA bearing fuel pin to beinstalled to TEF-P will increase due to accumulationof helium gas coming from the alpha decay of MA
nuclides. Hence the soundness of cladding of the fuelpin was evaluated. As a result, it was found that the
MA bearing fuel pin could be used up to 600°C. Burst
tests of the stainless steel cladding and simulation of
conditions of a loss from a cooling accident will be
performed.

Design of the TEF Beam Transport
The TEF beam transport (TEF-BT) was re-arranged
according to the changes in the facility layout. In the
beam transport line from TEF-BT to TEF-P, physicalbarriers for humans were introduced.
Because the output power of the TEF-P subcriticalassembly is influenced by the injected proton beam
power, the power has to be adjusted inside TEF-P. In
the case of a reactor scram, the injected proton beam
has to be also halted inside TEF-P. These functions areindispensable to separate the reactor components fromthe J-PARC accelerators. To satisfy these requirements,a beam power adjuster and a beam stopper wereconsidered in the TEF-P area in the downstream fromthe physical barriers.
The height of TEF-BT which equals the LINAC
beam line level (about 12 meters underground) andthe height of the reactor level (about 1 meter up fromthe ground) are different. The re-arrangement of the
TEF-BT especially for TEF-P is underway to connect theheight difference together with the relocation of the
TEF buildings.

R&D for TEF-T
Studies to Construct TEF-T
The experimental studies for LBE handling toconstruct TEF-T have been progressing. For the studyof target materials, the High-temperature Material
Corrosion Test Loop was installed in the end of March,2015. The loop’s purpose is the fundamental study ofthe future ADS development, such as corrosion datacollection for post-irradiation examination (PIE) on
TEF-T irradiated materials and development of afiltering system for LBE loops.
For the study of the components and operation,
the TEF-T Target Mock-Up Loop was constructed.
The loop is a demonstration test loop with the same
configuration/components as of the primary coolingsystem of TEF-T. All components are in actual scales,
except a temperature conditioner simulating heatgeneration by proton beam injection. The full-scale
operation is scheduled to begin in 2015.
For the study of remote handling techniques andinstruments, some tests have been performed by using
a test-stand for fundamental LBE technology. An MLFtype remote handling flange with some necessary
modifications was introduced as a joint to connect the
TEF-T target and the primary LBE loop. For the hightemperature operation, a package heater was adopted
and its remote exchange tests have been advancing.
The operation check of an induction type LBE level
gauge and a diaphragm type LBE pressure gauge inTransmutation Studies

J-PARC Annual Report 201440

Development of the oxygen sensor for LBE
An LBE target will be irradiated with a high-power(250 kW) proton beam in order to study the irradiation
effects on structural materials. It is presumed that LBE isa promising candidate material as ADS's proton beamspallation target and core coolant because it has goodneutron yield and is inactive chemically in comparison
with other coolant materials (e.g., water, sodium). On
the other hand, LBE is corrosive, so it is necessary tocontrol the oxygen concentration in LBE adequately
to protect the structural materials from corrosion. In
order to control the oxygen concentration in LBE, it isrequired to develop an oxygen sensor to measure theoxygen concentration.
The oxygen sensors have previously been purchased through international cooperation with Europe
and used to measure the oxygen concentration in LBE.
In 2014, J-PARC tried to fabricate two-types of oxygen
sensors (platinum type and bismuth type) based on
the European ones. Figure 3 shows the fabricated Pttype oxygen sensors. As a result, it was confirmed thatthe output voltage of the platinum type sensors wasadequate in a wide temperature range, as shown in
Fig. 4. For the platinum type sensor, it is known that
there is a possibility of LBE leakage if the sensor fails. To
prevent LBE leakage, a special structure was installed on
the sensor itself. It was confirmed by experiments that

Fig. 3. Exterior of the oxygen sensors (Pt-type)

Pt/Air sensor

800

750

EMF [mV]

static condition was completed without a problem.
The developments of oxygen sensors and an
ultrasonic flow meter have been started as key instrumentation technologies for the LBE loop system. The
results will be described in detail below.

700

650

600
340

Oxygen saturated
JAEA sensor #A
JAEA sensor #B
JAEA sensor EC

360

380

400

420

Temperature [°C]

440

460

Fig. 4. Measurement results by Pt-type sensors. (EMF= Electromotive Force which corresponds to the oxygen
concentration in LBE)

this special structure was functioning successfully toprevent the LBE leakage. This concept will be employed
to measure the oxygen concentration of the LBE loop
in TEF-T.
In the future, J-PARC will work in this field in collaboration with the JAEA's Nuclear Science and Engineering
Center, universities, and other partners to carry out
basic research to increase the precision of sensor outputs and to reduce the sensor failure rate, and performdemonstration tests in the LBE test loops.

Flow monitoring system for the LBE target
In TEF-T, LBE works as a coolant and spallation target
material. The flow rate of LBE is one of most importantparameters to secure the safety of the spallation target
system and define the sample environment. Flow measurement of heavy liquid metal is very difficult in generalbecause of its flowing condition and physical properties,
i.e. high temperature, opaque fluid, and low Pr number.
The poor wettability at solid-fluid boundaries isanother reason to complicate the flow measurement.
Electromagnetic flow meters (EMF) have been applied
to measure the LBE flow rate. However, instability in its
output was observed in JAEA’s LBE loops. To overcome
the difficulty in EMF, we have been developing an
LBE flow monitoring system based on the ultrasonicmethod.

Fig. 5. Photo of the exterior of the ultrasonic sensor

J-PARC Annual Report 2014

Transmutation Studies

41

Measured velocity[m/sec.]0.5

EMF [m/sec.]meas. velocity(1) [m/sec.]meas. velocity(2) [m/sec.]meas. velocity(3) [m/sec.]

0.4
0.3
0.2
0.1
0
- 0.1

0

5

10

15

20

25

30

35

Flow rate (EMF) [liter/min.]Fig. 6. Comparison of flow velocity vs. flow rate.
Measured velocity by ultrasonic system[m/sec.]0.40

Velocity [m/sec.]

We referred an ultrasonic monitoring systemdeveloped to measure sodium flow rate for fast reactors [1]. This system relies on the propagation timedifference method showing the following advantages:
the influence of change in the sound speed is low anda tracer medium is not necessary. Figure 6 shows theexterior of a semi-contactless type ultrasonic sensor.
A LiNbO3 element with a Curie point of 1140˚C is usedin the sensor. A sensor plug is made of high Cr steel toimprove wettability at solid-fluid boundaries.
The ultrasonic method was tested by using
the JAEA Lead Bismuth Loop #4 (JLBL-4). Figure 6
compares flow velocity vs. flow rate. The temperature of
LBE was 350˚C. The solid line shows velocity derived from
EMF output, and the data points ((1), (2), (3)) show themean velocity measured by the ultrasonic method over
several different days. The good correlativity between
the ultrasonic method and EMF was confirmed.
Figure 7 shows a result for a long-term operation
test of the ultrasonic method. The flow rate of LBE was
kept at 26.7 liter/min (velocity was about 0.36 m/s).
The error bars indicate fluctuation of the measured
velocity. It was confirmed that flow velocities measured
by the ultrasonic method were rather stable within
the error range of 3%, and the ultrasonic method was
reliable enough for monitoring the LBE flow. In near
future, we will continue the long-term operation testfor up to 5,000 hours that corresponds to the maximum
yearly operation period of TEF-T.

0.30

0.20

0

100 200 300 400 500 600 700 800

Time [h]Fig. 7. Result for a long-term operation test.

Reference[1] M.Hirabayashi, et al, Proc. of 13th ICON, 2005

R&D for TEF-P
Experiment related to the MA fuel treatment
In TEF-P, MA fuel will be used to perform reactor
physics experiments for MA transmutation systems suchas ADS or fast reactor. In order to handle the MA fuelwith large decay heat and radioactivity, it is necessary
to develop dedicated equipment, for instance remotehandling or cooling for the MA fuel. To perform thebasic experiments for the development of the MA fueltreatment methods, “MA fuel loading device”, and someother devices were developed.
Figure 8 shows the basic concept of the MA fuelloading device. Six MA fuel pins will be stored in a
cartridge and carried by a wagon. The MA fuel loading
device holds the cartridge itself and the loading rod
loads/takes one fuel pin to/from the core.

Figure 9 shows fabricated mockup equipment for
the MA fuel loading device. It was confirmed that it wasable to load or take a dummy fuel pin from the mock core
without failure. A future task will be the improvement of
the device to prevent it from dropping the fuel pin.
Laser Charge Exchange Technique
For the neutronics experiments using TEF-P, a low
reactor power of less than 1 kW is feasible to ensure
convenient experimental settings. To perform theexperiments at TEF-P under such reactor power, with aneffective neutron multiplication factor (keff ) around 0.97,
the incident proton beam power must be in the orderof 10 W. It is also important to keep and reproduce theexperimental condition especially for the injected proton

Transmutation Studies

J-PARC Annual Report 201442

Movable shielding

MA fuelCrane

Cartridge

Core

Loading rod

MA fuel Loading device

Mockup coverage
Wagon with cartridge

Fig. 8. Basic concept of the MA fuel loading device.

Mock core

Cartridge

After loading
Pin

Pin

Fig. 9. Mockup for the MA fuel loading device.

beam. Because the J-PARC accelerators focus on much
more higher beam power, the high-reliable low-power
proton beam extraction device is indispensable. The
development of a laser charge exchange technique forextraction of low power proton beam is now underway.
The laser charge exchange technique is firstly used for–beam profile monitoring and is applicable only for a H–
beam. When a laser beam is injected into a H beam,–
the charge of the H beam crossed with the laser beamchanges into neutral. These neutral particles do notsense the magnetic field of a bending magnet, and are–completely separated from the remaining H beam at
the exit of the bending magnet.
However, it is well-known that pre-neutralized H0particles are produced by collision with the remaining
gas in accelerator tubes and are transported with themain proton beam. When we apply the laser charge–
exchange technique to the H beam with the pre-neutralized protons, it becomes impossible to predict
the total power of the extracted beam. To eliminate
the pre-neutralized protons, we are trying to perform
laser injection and beam bending simultaneously in
one magnet. When the laser is injected in the magnetic
field of the bending magnet, the pre-neutralized beam
goes straight along the beam inlet direction and canbe separated from the clean low power proton beam at
the exit of the bending magnet.
A first demonstrative test of the laser charge
exchange technique is to investigate the stability of the
optical transport line and/or laser oscillator for obtaining a highly-reliable low-power proton beam. A Nd:YAG
laser system with a pulse width of less than 9 nsec, beamenergy of 1.6 J (repetition rate of 25 Hz) and an associated optical transport system have been prepared. Dataof the stability for the laser system over a long period oftime will be obtained.

J-PARC Annual Report 2014

Transmutation Studies

43

Other activities and international collaboration
PIE of MEGAPIE samples
A series of post irradiation examination (PIE) worksof the MEGAwatt Pilot Experiment (MEGAPIE) samples
started at JAEA’s hot-lab in March, 2014. The samples
were cut from the beam window (BW, material: T91)
and the flow guide tube (FGT, material: SS316L). The
total number of JAEA samples was 67 and all of themwere prepared without LBE.
Tensile tests were performed at the WAste Safety
Technology Engineering Facility (WASTEF). Fracturesurface observation after tensile tests and surface
observation were performed at the Reactor FuelExamination Facility (RFEF). By the end of May, 2014, thetensile tests on 23 samples were finished.
Results of tensile tests on T91 performed at room
temperature (RT) are shown in Figure 10. The results
indicate that the yield strength (YS) increased withthe dose level by 10-30%. Total elongation (TE) did notchange up to 0.82 dpa irradiation. After 1.44 dpa irradiation, TE decreased slightly. The YS values are almost at
the same level as the literature value while the TE values
are larger than the literature value. This may be attributed to the size effect of the specimen. Fracture surface
observation was performed by SEM. Transgranular ductile surface was observed and brittle fracture surface
was not.
Figure 11 shows the results of surface observation
by SEM for inner surface of Spitze (T91) specimen cut
from BW. Large number of pits was observed and theirdiameters were 10-30 μm.
T91_RT1000

UTT01 (Unirr.)
TT02 (0.76 dpa)
TT22 (0.82 dpa)
TT12 (1.44 dpa)

Stess (MPa)

800

600

400

200

0

10

20
30
40
50
Elongation (%)
Fig. 10. The results of the tensile tests on T91 performed
at RT.

50μm
Fig. 11. The results of surface observation by SEM of the inner surface of BW.

Meeting and workshops
A MEGAPIE final Technical Review Meeting (TRM)
was held at Bregenz (Austria) on October 23 and 24,
2014 subsequent to the 12th International Workshop
on Spallation Materials Technology (IWSMT-12) atthe same place on October 20-23, 2014. In the TRM,
PIE results of each of the institutes including JAEA
were reported and discussed. The workshop covered
research fields related to the spallation target, ADS andrelated materials. The research activities in Japan, China,
USA and Europe were presented and actively discussed.
The 12th International Workshop on Asian Network for ADS and Nuclear Transmutation Technology(NTT) was held at Hefei (China) on December 14-16t,
2014 In this workshop, JAEA’s scientists presented anddiscussed the current status of the TEF project and the
J-PARC linac, and the effect of the reactor physics experiments using TEF-P.
The SEARCH/MAXIMA 2014 International workshop was held at Karlsruhe (Germany) on October 7-10,
2014. The workshop’s goal was to bring together international experts working in the field of the advanced
heavy-liquid-metal cooling systems. In this workshop,
the present status of the R&D for ADS in Japan and the
TEF project were presented and actively discussed.

Safety

Radiation Safety
1. Overview
J-PARC is managed under the Law Concerning Prevention from Radiation Hazards Due to Radio-Isotopes,
etc. under the Japanese legal system. A license for use
is issued by the Nuclear Regulation Authority (NRA),
and the related safety inspections are conducted by the
Nuclear Safety Technology Center (NUSTEC).
The basic policy for radiation safety in J-PARC
has been discussed by the J-PARC Radiation Safety
Committee (RSC). We have discussed the specific rules
for radiation safety in the J-PARC Radiation Safety
Review Committee (RSRC) on the basis of this policy.
We applied the radiological license update twice to
the NRA during the fiscal year covered in this report.
2. Meeting and committee on radiation matters
The RSC was held four times during the fiscal year.

In the 19th and 20th Committee meetings, the safetymargin in the J-PARC shielding design policy, related tothe upgrade of the proton beam intensity of the Materials and Life Science Experimental Facility (MLF), wasdiscussed. In the design stage, the design targets forthe dose rates, which included the safety margin for
design uncertainties, were defined. The committees
approved the following items: (i) the safety margin for
design uncertainty could be omitted based on actual
operational experiences and measurements, and (ii)the concept of design targets would not be used in the
future. In the 22th Committee on January 6, the installation of the new interlock related to exhaust and gate
control of the accelerator tunnels was discussed.
The RSRC was held six times during the fiscal year
and its discussions covered mainly issues of the radiological license upgrade.

Safety

J-PARC Annual Report 201446
3. Radiological license update and inspections
Table 1 shows lists of licenses for utilization of radiation generators and radioisotopes at J-PARC at the endof Japanese fiscal year (JFY) 2013 and application items
for new licensing in JFY 2014.
Inspections of MLF were conducted twice by
NUSTEC, on April 25 and November 10, 2014; the firstinspection’s item was to check the shielding performance, and during the second one the interlock systemand the shielding performance were checked.

4. Radiation exposure of J-PARC radiation workers
Figure 1 shows the variation of the number of radiation workers in J-PARC since 2005. In JFY 2014, 3942
individuals were registered as radiation workers in
J-PARC. Table 2 summarizes the distribution of annual
doses for each category of workers. The radiation
exposure of the workers has been monitored individuallywith glass dosimeters for photons and solid-state
nuclear track detectors for neutrons. Almost all records
for individual exposure were undetectable, while thedoses for 113 persons (2.8% of the workers) weredetectable but less than 5.0 mSv.

Table 1. License at the end of fiscal year 2013 and application items for license in fiscal year 2014.

License at the end of fiscal year 2013

Application items for license in fiscal year 2014

MLF

Power : 3 GeV/350 kW
Secondary beam lines (neutron) : 19
Secondary beam lines (muon) : 3

Power : 3 GeV/1 MW
Secondary beam lines (neutron) : 1

HD

Power : 30 GeV/50 kW
Secondary beam lines (meson) : 4

Neutrino facilities

Power : 30 GeV/450 kW

Number of radiation workers

4500

3942

Number of radiation workers

4000

3113 3089

3500

Male

Female

2653

3000

2633

2154

2500

1864
2000
1500

704

1000
500
0

408
61
FY2005 FY2006 FY2007 FY2008 FY2009 FY2010 FY2011 FY2012 FY2013 FY2014

Fiscal Year

Fig. 1. Variation of the number of the radiation workers in J-PARC.

Table 2. Distribution of annual doses by the type of worker in fiscal year 2014.
Dose range X (mSv)

In-house staff

557

57

3

1

0

Total
Workers
596

User

1052

1

0

0

0

1053

UD

0.1 X 0.5 0.5 < X 1.0 1.0 < X 5.0

X > 5.0

Collective
dose(person-mSv)

Average
dose
(μSv)

12.7

21.3

0.2

0.2

Contractor

2220

72

1

0

0

2293

15.3

6.7

Total

3829

108

4

1

0

3942

28.2

7.2

User Service

User Service

J-PARC Annual Report 2014

48

Users Office (UO)
Outline
The J-PARC Users Office (UO) was established in2007. Since December, 2008, it has been located on the
1st floor of the IBARAKI Quantum Beam Research Center(IQBRC) in Tokai-mura. UO operates the Tokai Dormitory
for the users. In 2014, the Tokai Dormitory was added
more 49 rooms, and had 100 rooms. UO provides
on-site and WEB support with one-stop service for theutilization of the J-PARC with the cooperation of JAEA,
KEK, Comprehensive Research Organization for Scienceand Society (CROSS), and the IBARAKI Prefecture Local
Government. As of March 31, 2007, UO had 14 staffs
and WEB SE – 4 staffs.
The J-PARC Users after approval of their experimenttake administrative procedures on the Users Office (UO)
WEB portal site, registration as a J-PARC User, radiation
worker registration, safety education, accommodation,
invitation letter for visa and other requirements. Thenthe UO staffs support them on e-mail base. After theirarrival at the J-PARC, UO provides on-site support to
the J-PARC Users and they receive the J-PARC ID, glass
badge, and safety education.

1 Hitachi
Minami-ohta

Back(left to right)
Isozaki Mari
SANAO Ai
ARAKAWA Masao
ARIGA Asuko
YAMAGUCHI Kaori
KAWAKAMI Megumi
KIKUCHI Ayako

写真の前列左から
小林 さゆり（コバヤシ サユリ）
木村 理恵（キムラ リエ）
國府田 一成（コクフダ カズナリ）
鈴木 俊規（スズキ トシノリ）
藤澤 貴子（フジサワ タカコ）
関 美幸（セキ ミユキ）

Front(left to right)
KOBAYASHI Sayuri
KIMURA Rie
KOKUFUDA Kazunari
SUZUKI Toshinori
FUJISAWA Takako
SEKI Miyuki

TNiken-jaya
intersection

TOKAI
Smart IC

写真の後列左から磯崎 麻里（イソザキ マリ）
佐直 愛（サナオ アイ）
荒川 正夫（アラカワ マサオ）
有賀 明日子（アリガ アスコ）
山口 かおり（ヤマグチ カオリ）
川上 めぐみ（カワカミ メグミ）
菊池 綾子（キクチ アヤコ）

J PA
A

Tokai Village
OfficeJAEA Main Gate
(Central Security Office)[J-PARC]

Cocos
restaurant
62

PC depostore

Kakeagariintersection

Post Office

JR Tokai
StationTokai Hospital

Mobile phone
shop

Muramatsu
ShrineFire Station

Joban
Expressway

Magome-jujiro
intersection
349

Kasamatsu
Park

Ibaraki Higashi
National Hospital
245

Macdonald
Humbugger Shop
Lawson31

JR JobanLine

Naka-city Hall

3
2

Naka

Hitachinaka

Higashi MITO Expressway

J-PARC Annual Report 2014

User Service

49

Activities of UO

J-PARC Users

Technical support

Technical contact
personResearch Proposal
Proposal Advisory
Committee

J-PARC Users Office
Procedures for J-PARC site
access
ID cardPortal site
Rental goods

Support Service for
Daily Life

Support for J-PARC Utilization

Accomodation
Rent-a-car
Living information

User room
Radiation/Facility
safety education

One-stop service for J-PARC users

RQWKHZHE
6WHS

RQVLWHVXSSRUW

8VHUUHJLVWUDWLRQ

1HZXVHU
5HJLVWHUHGXVHU*HWWLQJXVHU,' $QQXDOUHJLVWUDWLRQVSHFLI\LQJ
RIWKHYLVLW$SSURYDORI82

3URFHGXUHVXSRQDUULYDO

6WHS

DWWKHrUVWGD\
5HFLHYH-3DUF8VHU,'FDUG
9HKLFOH3HUPLVVLRQSDVV

6DIHW\HGXFDWLRQDQGGRVLPHWHU

5HQWDOJRRGV

6WHS 2EOLJDWRU\DSSOLFDWLRQ%LF\OH
3+6&DIHWHULDFDUG/RFNHUNH\
2îFHNH\$SSOLFDWLRQIRUPWRYLVLW-3$5&
9LVLWSURSRVDO IRUHLJQQDWLRQDOLW\
5HVHUYDWLRQRIVDIHW\WUDLQLQJ

6WHS -3$5&([SHULPHQWDQGPHHWLQJ
6WHS

8VHUV2îFHDW,4%5&2îFHKRXUV 0RQ)UL

5HQWDOELF\FOH

2SWLRQDODSSOLFDWLRQ-3$5&&DUGIRUIDFLOLW\DFFHVV
5DGLDWLRQZRUNHUUHJLVWUDWLRQ
1HWZRUNUHJLVWUDWLRQ
5HVHUYDWLRQRI'RUPLWRU\,QYLWDWLRQOHWWHUIRU9LVD

6WHS

/HDYLQJSURFHGXUHV5HWHUQDOOFDUGVNH\VUHQWDOJRRGV82
RîFHKRXUV RUUHWXUQER[5HWXUQER[DW,4%5&

User Service

J-PARC Annual Report 2014

50

User Statistics
Users in 2014 (Japanese ⁄ Foreigners, person-days)

Users in 2014 (according to facilities,
person-days)

Users in 2014 (according to organizations,person-days)

J-PARC Annual Report 2014

User Service

51

MLF Proposal Summary - FY2014
Table 1. Breakdown of Proposal Numbers for the 2014A & 2014B Rounds.
Beamline
BL01
BL02
BL03
BL04
BL05
BL08
BL09
BL10
BL11
BL12
BL14
BL15
BL16
BL17
BL18
BL19
BL20
BL21
D1
D2
U

2014A
2014B
Full Year
Submitted Approved Submitted Approved
Submitted
Approved
GU
GU
GU
GU
PU/S IU
ES PU/S IU
ES
4D-Space Access Neutron Spectrometer - 4SEASONS
20(1)
14(1)
17(1)
13(1)
3
1
1
3
1
1
Biomolecular Dynamics Spectrometer - DNA
18(1)
10(1)
23(1)
13(1)
3
2
0
3
2
0
‡
6
2
8
2
0
0
0
0
0
0
(100-b)Ibaraki Biological Crystal Diffractometer - iBIX
†
0
0
0
0
15
0
0
9
0
0
(b)
Accurate Neutron-Nucleus Reaction Measurement Instrument - ANNRI
6
6
12
10
1
1
0
1
1
0
Neutron Optics and Physics - NOP
5
2
3
1
1
0
0
1
0
0
Super High Resolution Power Diffractometer - S-HRPD
15
8
14
10
1
0
1
1
0
1
Special Environment Neutron Powder Diffractometer - SPICA
0
0
0
0
1
0
0
1
0
0
Neutron Beamline for Observation and Research Use - NOBORU
21
10
26
11
2
1
0
2
1
0
High-Pressure Neutron Diffractometer - PLANET
14
11
9(1)
9(1)
0
1
0
0
1
0
High Resolution Chopper Spectrometer - HRC
9
5
12(2)
8(2)
1
0
0
1
0
0
Cold-neutron Disk-chopper Spectrometer - AMATERAS
21
7
29
9
2
1
2
2
1
2
Small and Wide Angle Neutron Scattering Instrument - TAIKAN 37(2)
18(2)
40
15
5
1
3
5
1
3
High-Performance Neutron Reflectometer with a horizontal
11
10
7
7
1
0
0
1
0
0
Sample Geometry - SOFIA
Polarized Neutron Reflectometer - SHARAKU
20
14
12(1)
12(1)
1
1
1
1
1
1
Extreme Environment Single Crystal Neutron Diffractometer - SENJU
24
7
25(1)
10(1)
3
3
0
3
3
0
Engineering Diffractometer - TAKUMI
25
15
28
13
3
1
2
3
1
2
‡
16
7
9
9
0
0
0
0
0
0
(100-b)Ibaraki Materials Design Diffractometer - iMATERIA
†
14
14
7
7
14
0
0
13
0
0
(b)
High Intensity Total Diffractometer - NOVA
21
13
14
8
1
0
1
1
0
1
Muon D1
21(1)
16(1)
34(2)
16(2)
0
1
0
0
1
0
Muon D2
11
10
13(1)
9(1)
0
1
0
0
1
0
Muon U
0
0
0
0
1
0
0
1
0
0
Total
335
199
342
192
59 15 11 52 15 11
Instrument

GU : General Use
PU : Project Use or Ibaraki Pref. Project Use
S : S-type Proposals
IU : Instrument Group Use ES : Element Strategy† : Ibaraki Pref. Exclusive Use Beamtime (β = 80% in FY2014)‡ : J-PARC Center General Use Beamtime ((100-β = 20% in FY2014)( ) : Proposal Numbers under Trial Use Access System or P-type proposals (D1, D2) in GU

J-PARC PAC Approval Summary after the 19th Meeting(Co-)
Spokespersons

Affiliation

Title of the experiment
Measurement of X rays from Ξ− Atom

Slow line priority
Approval
status (PAC
Day1 Beamline
recommendation) Day1? Priority

E03 K. Tanida

SNU

J.C. Peng;
P04
S. Sawada

U of lllinois at Urbana- Measurement of High-Mass Dimuon Production at theDeferredChampaign; KEK
50-GeV Proton Synchrotron
12
Stage 2
Spectroscopic Study of Ξ-Hypernucleus, ΞBe, via the
Day1
Kyoto U
12+
C(K , K ) Reaction
Higer priority than E31+
Measurement of T-violating Transverse Muon Polarization in K
KEKStage 10 +→ π µ ν Decays

E05 T. Nagae
E06 J. lmazato

K. lmai,
JAEA, Gifu U,
E07 K. Nakazawa,
Tohoku U
H. Tamura

Systematic Study of Double Strangeness System with an
Emulsion-counter Hybrid Method

E08 A. Krutenkova lTEP

Pion double charge exchange on oxygen at J-PARC

A. Sakaguchi, Osaka U,
E10
T. Fukuda
Osaka EC U

Production of Neutron-Rich Lambda-Hypernuclei with the Double
Charge-Exchange Reaction (Revised from lnitial P10)
Tokai-to-Kamioka (T2K) Long Baseline Neutrino Oscillation
Experimental Proposal

E11 T. Kobayashi KEK
E13 H. Tamura

Stage 2

1

K1.8
K1.1BR
K1.8

Stage 1

K1.8

Stage 2

K1.8

Stage 2neutrinoGamma-ray spectroscopy of light hypernuclei

Stage 2

E14 T. Yamanaka Osaka U

Proposal for KL → π ν ν– Experiment at J-PARC

Stage 2

M. lwasaki,
E15
T. NagaeA
Search for deeply-bound kaonic nuclear states by in-flight3
He(K-, n) reaction

Stage 2

RlKEN, Kyoto U

Primary

Stage 2Highest priority for test

Tohoku U

0

K1.8

Day1

2

K1.8
KL

Day1

K1.8BR

User Service

J-PARC Annual Report 2014

52
(Co-)
Spokespersons
E16 S. Yokkaichi

Affiliation
RlKEN

R. Hayano,
U Tokyo, RlKEN
H. Outa
H. Bhang, H.
E18
SNU, RlKEN, KRlSS
Outa, H. ParkE17

E19 M. Naruki
E21 Y. Kuno
E22

KEK
Osaka US. Ajimura,
Osaka U
A. Sakaguchi

T25 S. Mihara

KEK

E26 K. Ozawa

KEK

E27 T. Nagae

Kyoto U

Slow line priority
Approval
status (PAC
Day1 Beamline
recommendation) Day1? Priority

Title of the experimentElectron pair spectrometer at the J-PARC 50-GeV PS to explore
Stage 1
Stage 2 deffered
the chiral symmetry in QCD
Stage 2
3
Day1
Precision spectroscopy of Kaonic He 3d → 2p X-rays
Update the proposal
12
Coincidence Measurement of the Weak Decay of ΛC and theStage 2three-body weak interaction process+
High-resolution Search for Θ Pentaquark in π-p → K-X Reactions
Stage 2
Day1
An Experimental Search for µ - e Conversion at a Sensitivity of
16
10- with a Slow-Extracted Bunched Beam
Exclusive Study on the Lambda-N Weak lnteraction in A=4
Lambda-Hypernuclei (Revised from lnitial P10)
Extinction Measurement of J-PARC Proton Beam at K1.8BR(A-1)
Search for ω-meson nuclear bound states in the π-+AZ → n+ ω(Z-1)
0reaction, and for ω mass modification in the in-medium ω → π γ decay+ +Search for a nuclear Kbar bound state K pp in the d(π ,K ) reaction

High p
K1.8BR
K1.8
K1.8

Stage 1
Stage 2 deffered

COMET

Stage 1

K1.8

Test Experiment(coord'ed by JPNC)

K1.8BR

Stage 1

K1.8

Stage 2

K1.8

Search for φ-meson nuclear bound states in the p–+ AZ → φ +Stage 1(Z-1) reaction
Spectroscopic study of hyperon resonances below KN
Stage 2
Pilot run approved withthreshold via the (K-,n) reaction on DeuteronTowards a Long Baseline Neutrino and Nucleon Decay Experiment witha next-generation 100 kton Liquid Argon TPC detector at Okinoshima Test Experimentand an intensity upgraded J-PARC Neutrino beam

K1.8BRP33 H.M. Shimizu Nagoya U

Measurement of Neutron Electric Dipole Moment

Deferred

Linac

N. Saito,E34
M. lwasaki
M. Kohl,
E36
S. Shimizu

Stage 1

MLF

Hampton U,
Osaka U

An Experimental Proposal on a New Measurement of the Muon
Anomalous Magnetic Moment g-2 and Electric Dipole Moment at J-PARC
Measurement of Γ(K+ → e+ ν)/Γ(K+ → µ+ ν) and Search forheavy sterile neutrinos using the TREK detector system

Stage 2

K1.1BR

E40 K. Miwa

Tohoku U

Measurement of the cross sections of ∑p scatterings

Stage 1
Stage 2 deffered

K1.8

P41 M. Aoki

Osaka U

An Experimental Search for µ - e Conversion in Nuclear Field at a
-14
Sensitivity of 10 with Pulsed Proton Beam from RCS

Deferred

MLF

E42 J.K. Ahn

E29 H. Ohnishi

RlKEN

E31 H. Noumi

Osaka U

T32 A. Rubbia

ETH, Zurich

KEK, RlKEN

(A-1)

K1.1

K1.1BR

Pusan National U

Search for H-Dibaryon with a Large Acceptance Hyperon Spectrometer

Stage 1

K1.8

K.H. Hicks,
E45
H. Sako

Ohio U, JAEA

3-Body Hadronic Reactions for New Aspects of Baryon
Spectroscopy

Stage 1K1.8

T46 K. Ozawa

KEK

EDlT2013 beam test program

Test Experiment

K1.1BR

T49 T. Maruyama KEK

Test for 250L Liquid Argon TPC

Test Experiment

K1.1BRP50 H. Noumi

Osaka U

Charmed Baryon Spectroscopy via the (π,D*-) reaction

Stage 1 status

High p

T51 S. Mihara

KEK

Research Proposal for COMET(E21) Calorimeter Prototype Beam Test Test Experiment

K1.1BR

Test of fine pixel CCDs for lLC vertex detector

K1.1BR

T52 Y. Sugimoto KEK
T53 D. Kawama

RlKEN

T54 K. Miwa

Tohoku U

T55 A. Toyoda

KEK

P56 T. Maruyama KEK

Test Experiment

Test of GEM Tracker, Hadron Blind Detector and Lead-glass EMC
Test Experiment
for the J-PARC E16 experiment
Test experiment for a performance evaluation of a scattered
Test Experiment
proton detector system for the Σp scattering experiment E40

K1.1BR

Second Test of Aerogel Cherenkov counter for the J-PARC E36 experiment Test Experiment

K1.1BRA Search for Sterile Neutrino at J-PARC Materials and Life
Science Experimental Facility

MLF

Deferred

Stefan Meyer Institute Measurement of the strong interaction induced shift and width Deferred Update
for Subatomic Physics of the 1s state of kaonic deuterium at J-PARC
the proposal
A Long Baseline Neutrino Oscillation Experiment Using J-PARC
P58 M. Yokoyama U. Tokyo
Deferred
Neutrino Beam and Hyper-Kamiokande
A test experiment to measure neutrino cross sections using a 3D grid-like neutrino
To be arranged by
T59 A. Minamino Kyoto U
detector with a water target at the near detector hall of J-PARC neutrino beam-line
IPNS and KEK-T2K
To be arranged by
T60 T. Fukuda
Toho U
Proposal of an emulsion-based test experiment at J-PARC
IPNS and KEK-T2K
P57 J. Zmeskal

K1.1BR

K1.8BRneutrino
neutrino
monitor bld
neutrino
monitor bld

J-PARC Annual Report 2014

Organization and Committees

53

Organization and Committees

Organization and Committees

J-PARC Annual Report 2014

54

Organization Structure
J‐PARC Center Management System Chart
as of April 1, 2014
Deputy Director(Safety)
M. Baba

When applicable

Head – Deputy Head
Leader – Sub Leader
Radiation Safety Section

Safety Division

Y. Miyamoto – M. Numajiri

T. Ishii ‐ K. Bessho

General Safety Section
Y. Nakane
Accelerator Section I
H. OguriAccelerator Section II
M. Kinsho
Accelerator Section III
N. OuchiAccelerator Division
T. Koseki ‐ K. Hasegawa

Accelerator Section IV
K. Kikuchi
Accelerator Section V
Y. Hori
Accelerator Section VI
N. Yamamoto
Accelerator Section VII
F. Naito

Y. Ikeda

Neutron Source Section

Director

H. Takada – Y. Kasugai

Deputy Director(JAEA)
T. KatoNeutron Science Section

Materials & Life Science
Division
M. Arai – H. Seto, M. Futakawa

K. Nakajima – Y. Kawakita
Neutron Instrumentation Section
K. Soyama
Muon Science Section
Y. Miyake

Deputy Director(KEK)

Technology Development Section
K. Aizawa – T. Oku

N. Saito
Particle & Nuclear Physics
Division
T. Kobayashi – T. Komatsubara

Director’s Office

Neutrino Section
Y. Fujii
Hadron Section
S. Sawada
Transmutation Section

Advisor (J‐PARC): S. Nagamiya
Advisor (Neutron): K. Kakurai
Advisor (Safety): T. Shibata
Advisor (International Relations):
T. K. Ohska
Leader (International Relations):
Y. Watanabe

H. Oigawa – T. Sasa
Cryogenics Section
Y. Makita – K. Sasaki
Operations Support Section
H. Yoshikawa
Information System Section
A. Manabe – K. Gorai
Public Relations Section
T. KatoAdministration
Division
T. Yamashita – T. Ikeda

General Affairs Section
T. Ikeda – H. Morita
Users Affairs Section
T. Yamashita – T. Kodama
Users Office

K. Kokufuda

J-PARC Annual Report 2014

Organization and Committees

55

Members of the Committees Organized for J-PARC(as of March, 2015)

1) Steering Committee
Yuji Fujita

Japan Atomic Energy Agency, Japan

Yujiro Ikeda

J-PARC Center, Japan

Hisayoshi Ito

Japan Atomic Energy Agency, Japan

Hideki Namba

Japan Atomic Energy Agency, Japan

Masaharu Nomura

High Energy Accelerator Research Organization, Japan

Katsunobu OideHigh Energy Accelerator Research Organization, Japan

Yukio Oyama

Japan Atomic Energy Agency, Japan

Takayuki Sumiyoshi

High Energy Accelerator Research Organization, Japan

Hiroshi Uetsuka

Japan Atomic Energy Agency, Japan

Kazuyoshi YamadaHigh Energy Accelerator Research Organization, Japan

Masanori Yamauchi

High Energy Accelerator Research Organization, Japan

2) International Advisory Committee
Jean-Michel Poutissou

TRIUMF, Canada

Hiroshi Amitsuka

Graduate School of Science, Hokkaido University, Japan

Thomas Roser

Brookhaven National Laboratory, USA

Shinian Fu

Institute of High Energy Physics, China

Sergio Bertolucci

the European Organization for Nuclear Research(CERN), Switzerland

Robert Tschirhart

Fermi National Accelerator Laboratory, USA

Robert Tribble

Brookhaven National Laboratory, USA

Donald F. Geesaman

Argonne National Laboratory, USA

Horst Stoecker

GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany

Hajimu Yamana

Research Reactor Institute, Kyoto University, Japan
Nuclear Damage Compensation and Decommissioning Facilitation Corporation, Japan

Hamid Aït Abderrahim

SCK • CEN, BelgiumJoël Mesot

Paul Scherrer Institute, Switzerland

Hidetoshi Fukuyama

Research Institute for Science & Technology, Tokyo University of Science, Japan

Robert Robinson

Bragg Institute, Australian Nuclear Science and Technology Organisation, Australia

Andrew Dawson Taylor

National Laboratories, Science and Technology Facilities Council, UK

3) User Consultative Committee for J-PARC
Masatoshi AraiJapan Atomic Energy Agency, Japan

Yasuhiko Fujii

CROSS, Japan

Makoto Hayashi

Ibaraki Prefecture, Japan

Tomohiko Iwasaki

Tohoku University, Japan

Toshiji Kanaya

Kyoto University, Japan

Yoshiyuki Kawakami

Eisai Co., Ltd., Japan

Yoshiaki Kiyanagi

Nagoya University, Japan

Organization and Committees

J-PARC Annual Report 2014

56
Takashi Kobayashi

High Energy Accelerator Research Organization, Japan

Yoji Koike

Tohoku University, Japan

Sachio Komamiya

University of Tokyo, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization, Japan

Junichirou Mizuki

Kwansei Gakuin University, Japan

Tomofumi Nagae

Kyoto University, Japan

Takashi Nakano

Osaka University, Japan

Tsuyoshi Nakaya

Kyoto University, Japan

Yamada Yoshiyuki

Central Research Laboratory, Hitachi, Ltd., Japan

Taku Sato

Tohoku University, Japan

Tanaka KazuhiroHigh Energy Accelerator Research Organization, Japan

Masaaki Sugiyama

Kyoto University, JapanJun Sugiyama

Toyota Central R&D Labs., Inc., Japan

Hirokazu Tamura

Tohoku University, Japan

Kazuhiro Tanaka

High Energy Accelerator Research Organization, Japan

Eiko Torikai

Yamanashi University, Japan

Taku Yamanaka

Osaka University, Japan

Satoru Yamashita

University of Tokyo, Japan

4) Accelerator Technical Advisory Committee
Marc Schyns

SCK • CEN, Belgium

Eric Pitcher

European Spallation Source ESS AB, Sweden

Yacine Kadi

CERN, Switzerland

Yoshiaki Kiyanagi

Graduate School of Engineering, Nagoya University, Japan

Toshikazu Takeda

Reserch Instutute of Nuclear Engineering, University of Fukui, Japan

Juergen Konys

Institute for Applied Materials Materials Process Technology, Karlsruhe Instituteof Technology, Japan

Minoru Takahashi

Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Japan

Jie Wei

Michigan State Univ., USA

Robert Zwaska

Fermi National Accelerator Laboratory, USA

Simone Gilardoni

European Organization for Nuclear Research (CERN), Switzerland

5) Neutron Advisory Committee
Robert McGreevy

Rutherford Appleton Laboratory, UK

Bertrand Blau

Paul Scherrer Institut (PSI), Switzerland

John D Galambos

Oak Ridge National Laboratory, USA

Yoshiaki Kiyanagi

Nagoya University, JapanDan Alan Neumann

National Institute of Standards and Technology, USA

Jamie Schulz

Australian Nuclear Science and Technology Organization (ANSTO), Australia

Dimitri Argyriou

ESS AB, Sweden

Chang Hee Lee

Korea Atomic Energy Research Institute, Korea

Toshiji Kanaya

Institute for Chemical Research, Kyoto University, Japan

Mitsuhiro Shibayama

Institute for Solid State Physics, Tokyo University, Japan

J-PARC Annual Report 2014

Organization and Committees

576) Muon Science Advisory Committee
Hiroshi Amitsuka

Hokkaido University, Japan

Toshiyuki Azuma

RIKEN, Japan

Klaus P. Jungmann

University of Groningen, Netherlands

Elvezio Morenzoni

Paul Scherrer Institute, Switzerland

Yasuo Nozue

Osaka University, Japan

Francis Pratt

ISIS, UK

Jeff E. Sonier

Simon Fraser University, Canada

Jun Sugiyama

Toyota Centaral R & D Labs., Inc., Japan

7) Radiation Safety Committee
Seiichi Shibata

RIKEN, Japan

Yoshitomo Uwamino

RIKEN, Japan

Yoshihiro Asano

RIKEN, Japan

Tetsuo Noro

Kyushu University, Japan

Murakami Takeshi

National Institute of Radiological Science, Japan

Hitoshi Kobayashi

High Energy Accelerator Research Organization, Japan

Yoshihito Namito

High Energy Accelerator Research Organization, Japan

Shinichi Sasaki

High Energy Accelerator Research Organization, Japan

Kazuo Minato

Japan Atomic Energy Agency, Japan

Takeshi Maruo

Japan Atomic Energy Agency, Japan

Michio Yoshizawa

Japan Atomic Energy Agency, Japan

8) MLF Advisory Board
Jun AKIMITSU

Aoyama Gakuin University

Koichiro ASAHITokyo Institute of Technology

Mikio KATAOKA

Nara Institute of Science and Technology

Toshiji KANAYA

Kyoto University

Taku SATO

Tohoku University

Mitsuhiro SHIBAYAMAThe University of Tokyo

Masaaki SUGIYAMA

Kyoto University

Makoto HAYASHIIBARAKI Prefectural Government

Toshio YAMAGUCHI

Fukuoka University

Masahiko IWASAKIRIKENYouji KOIKE

Tohoku University

Jun SUGIYAMA

Toyota Central R&D Labs., Inc.

Yasuhiko FUJII

Comprehensive Research Organization for Science and Society

Masatoshi ARAIJapan Atomic Energy Agency

Takashi KATO

Japan Atomic Energy Agency

Masatoshi FUTAKAWA

Japan Atomic Energy Agency

Kazuya AIZAWA

Japan Atomic Energy Agency

Masayasu TAKEDA

Japan Atomic Energy Agency

Yukinobu KAWAKITA

Japan Atomic Energy Agency

Organization and Committees

J-PARC Annual Report 2014

58
Hideki SETOHigh Energy Accelerator Research Organaization

Takashi KAMIYAMAHigh Energy Accelerator Research Organaization

Toshiya OTOMOHigh Energy Accelerator Research Organaization

Yasuhiro MIYAKEHigh Energy Accelerator Research Organaization

Ryosuke KADONOHigh Energy Accelerator Research Organaization

Shinichi ITOH

High Energy Accelerator Research Organaization

Toshio AKAIMCHC R&D Synergy Center, Inc.

Shin-ichi KAMEI

Mitubishi Reserch Institute, Inc.

Naoki KISHIMOTO

National Institute for Material Science

Masaki TAKADA

RIKEN

Kiyoyuki TERAKURA

National Institute of Advanced Industrial Science and Technology

kazumi NISHIJIMA

Mochida Pharmaceutical co.,Ltd.

Hidetoshi FUKUYAMATokyo University of Science

Kazuyoshi YAMADAHigh Energy Accelerator Research Organaization

Yujiro IKEDA

Japan Atomic Energy Agency

Hideaki YOKOMIZO

Comprehensive Research Organization for Science and Society

Wataru Utsumi

Japan Atomic Energy Agency

9) Program Advisory Committee (PAC) for Nuclear and Particle Physics Experiments at the J-PARC 50 GeV Proton
Synchrotron
Gino Isidori

Frascati National Laboratories, Italy

William A. Zajc

Columbia University, Columbia

Simon I. Eidelman

Budker Inst. of Nuclear Physics, Russia

Tetsuo Hatsuda

RIKEN, Japan

Kazunori Hanagaki

Osaka University, Japan

Edward C. Blucher

University of Chicago, USA

Thomas E. Browder

University of Hawaii, USA

William C. Louis

Los Alamos National Laboratory, USA

Wolfram Weise

European Center for Theoretical studies in Nuclear Physics and Related Areas, Italy

Ken-ichi Imai

Kyoto University, Japan

Kunnio Inoue

Tohoku University, Japan

Hiroyoshi Sakurai

University of Tokyo, Japan

Hajime Shimizu

Tohoku Univerisity, Japan

Akinobu DoteHigh Energy Accelerator Research Organization, Japan

Junji Haba (Chairperson)

High Energy Accelerator Research Organization, Japan

Main Parameters

Main Parameters

J-PARC Annual Report 2014

60
Present main parameters of Accelerator
Linac
Acclerated Particles
EnergyPeak Current
Pulse Width
Repetition Rate
Freq. of RFQ, DTL, and SDTL
Freq. of ACS

Negative hydrogen
400 MeV
30 mA
0.5 ms
25 Hz
324 MHz972 MHzRCS

Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

348.333 m
400 MeV
3 GeV
25 Hz
0.938 MHz → 1.67 MHz2
12
24
Main Ring

Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

1567.5 m
3 GeV
30 GeV~0.4 Hz1.67 MHz → 1.72 MHz
9896

Key parameters of Materials and Life Science Experimental Facility
Injection Energy

3 GeV

Repetition Rate

25 Hz
Neutron Source

Target Material
Number of Moderators
Moderator Material
Moderator Temperature/Pressure
Number of Neutron Beam Ports

Mercury
3
Supercritical hydrogen
20 K / 1.5 MPa
23

Muon Production Target
Target Material
Number of Muon Beam Extraction Ports

Graphite4

Neutron Instruments
Open for User Program (General Use)
Under Commissioning/Construction
Muon Instruments
Open for User Program (General Use)(* As of March, 2015)

*

18
0/3
*

2

Events

Events

J-PARC Annual Report 201462

Events
2014 Workshop for Fostering Safety
Culture at J-PARC (May 23)
In order to further improve the safety awarenessand prevent the memories of the radioactive leak incident at the Hadron Experimental Facility in 2013 fromfading away, J-PARC decided to hold a Workshop for
Fostering Safety Culture every year in May. On May 23,
the first workshop was held at the auditorium of the
Nuclear Science Research Institute (JAEA-Tokai andbroadcasted via TV to auditoriums at the Tsukuba andTokai Campuses of the High Energy Accelerator Research
Organization (KEK). At the workshop, J-PARC members
reported on the safety progress in the year following theincident, the status of the renovation work at the Hadron
Experimental Facility, plans for the future, and othertopics. In addition, the journalist Naoyuki Uchimura,a member of the External Expert Panel for reviewing theincident, gave a talk entitled “Re-examining ‘Research
Facilities and Safety Culture’.”Mr. Uchimura interviewed participants after his talkOperation of Neutrino Experimental
Facility Resumes (May 26)
At the Neutrino Experimental Facility, tests to evaluate
the performance started on May 16 and the user operation was resumed on May 26. Before that, on the 22nd at
the Tokai Campus of KEK, an explanatory meeting prior toresumption of the neutrino experiment was held for thepress.

“The mysteries of Neutrinos and the Higgs Particle”, andcovered the latest discoveries in particle physics. There
was a lively question-and-answer session afterward to
wrap up this worthwhile meeting.

“Science Cafe” at Ricotti

The 2nd International Symposium on
Science at J-PARC 2014 (July 12-16)
The J-PARC Center held this symposium at the
Tsukuba International Congress Center, which started
on July 12 with a public lecture entitled “Unveiling the
Mysteries of the Universe” and continued for five days until
the 16th. On the first day, a public lecture was held, forwhich as lecturers were invited Dr. Ulrich Walter, Professor
at the Technical University of Munich, who became thefirst German astronaut after obtaining his doctorate forneutron research, and Dr. Masaru Tada who is involved in
the neutrino oscillation experiment at J-PARC. The lecture
was attended by 212 persons in total. The main symposium covered five fields: accelerators, particle and nuclear
physics, materials and life science, nuclear transmutation,and safety and advanced technology for the intensity
frontier. There was a total of 137 oral presentations, including 13 keynote lectures, and 245 poster presentations
attracting 550 participants from 20 countries.

24th Meeting of “Science Cafe at Ricotti”(June 21)At the “Science Cafe”, organized by the Japan Atomic
Energy Agency (JAEA), J-PARC’s public relations advisor
Dr. Shinichi Sakamoto gave a talk for the general public
incorporating unique experiments. The talk was entitledParticipants in the symposium

J-PARC Annual Report 2014

Events63

Science Tour (July 12)
With support from the Tokai Village, the J-PARC
Center organized a science tour for junior and seniorhigh school students living in the Tokai Village to help
develop their interest in science. During this tour, thestudents visited Japan Aerospace Exploration Agency(JAXA) and participated in a public lecture at the J-PARC
International Symposium.

J-PARC public relations advisor, Dr. Shinichi Sakamoto,explained the power of electricity to the children in aneasy-to-understand way through quizzes and experiments in which static electricity was used to moveand rotate familiar objects. Then the students worked
to make a “pendulum bell” using static electricity, anda “clip motor” using enamel wire and a magnet. The
participating children received support from the staff,
and had fun working on their projects.

Participants at display space in JAXA
Clip motor: A coil rotates in a magnetic field

J-PARC Scientists Teach at the Tokai-muraSummer School (July 24)
In order to deepen the interest in science, the Tokai
Village organized a “science summer school” for firstyear students of two junior high schools in the village.
Four lectures were given by young researchers who
are active at J-PARC and JAEA. From J-PARC, Dr. Masaru
Tada of the Neutrino Section and Dr. Seiko Kawamura of
the Neutron Science Section gave a talk to 400 students
in total.

Ozora Marche at the Muramatsu-san
Kokuzodo Temple (October 12)
This event was held by the Tokai Sightseeing Guidefor passing the culture and history of the Tokai Village
to the next generation. J-PARC participated in the eventfor the first time and set up a “Science Experiment
Corner,” where flowers, rubber balls and other items
were frozen by liquid nitrogen, and a superconductor
was cooled and ran along a rail made of magnets. Many
people participated, ranging in age from children to
adults, and experienced the unusual low-temperatureworld.

Summer school at Ricotti

J-PARC Hello Science - “Feel the Powerof Electricity and Magnetism!” Summer
Workshop for Children- (August 6 and 9)
J-PARC held a science project workshop called“J-PARC Hello Science” for fifth and sixth-year students
from elementary schools in the village. First, theRubber ball frozen by liquid N2

Events

J-PARC Annual Report 201464

21st International Collaboration on Advanced Neutron Source ICANS-XXI (September
29 to October 3)This event was held at the Ibaraki Prefectural
Culture Center, and included about 220 researchers
from major research institutions
and facilities from eight countries,
involved in nuclear spallation
neutron sources. There were 210
presentations in 11 workshops foreach area of research, and a “BlueSky Session” for brainstorming
where participants in the halljoined the discussion. On the final
day, approximately 90 people

participated in the J-PARC tour, in which they took acloser look at the experimental equipment.

Takashi Kobayashi, jointly received the
Nishina Memorial Prize 2014

Successful First Beam Extraction fromthe Pulsed Neutron Imaging Instrument(November 7)

Professor Takashi Kobayashi, Head of the Particle
and Nuclear Physics Division of J-PARC, received the
Nishina Memorial Prize for 2014 jointly with Professor
Tsuyoshi Nakaya of Kyoto University for their achievement in discovering the phenomenon in which electron
neutrinos appear from a beam of muon neutrinos in the
T2K Experiment. The Nishina Memorial Prize is awarded
to researchers who have achieved outstanding research
results related to atomic physics and its applications.

Participants of the ICANS XXIOn November 7, neutron beam extraction was
successfully achieved for the first time at the world’s
first Energy Resolved Neutron Imaging System (BL22:
RADEN), which has been newly installed at the Materials and Life Science Experimental Facility. RADEN isa system which enables non-destructive observation
inside matter using neutron beams.

Neutrom beam

Detector
Sample stage

Flight tube

The inside of the RADEN measuring room

Prof. Kobayashi (left) and Prof. Nakaya (right)

Completion of the Tokai Dormitory II
Building
The 51-room expansion of the Tokai Dormitory
facilities for lodging of J-PARC users has been completed
and the number of rooms doubled to 100.

J-PARC Annual Report 2014

Events65

Seventh Meeting of the External Expert
Panel to Review the Incident at the
Hadron Experimental Facility (October 29)
On October 29, the 7th External Expert Panel toreview the radioactive material leak incident at the
J-PARC Hadron Experimental Facility was held in Tokyo.
The J-PARC Center reported on topics such as the safety
management system review and the facility renovation work based on measures to prevent recurrence
submitted by the panel in August last year. As a resultof a general review, it was confirmed that the efforts
are being properly carried out, and that the restartingof the facilities was justified. The panel proposed that
we explain the matters to the local residents and obtain
their understanding, and that we ensure continued
awareness of crisis management.

Hello Science School (December 15)
A science experiment school was held jointly with
the Tokai Village for junior high school students fromthe local area. The participating students were given aneasy-to-understand explanation of topics such as theprinciple of operation of the huge accelerator research
instrument, while using experimental equipment
constructed from familiar materials.

Basics of a motor were taught with handmade experimental
equipment

Success in Transporting 1-MW
Equivalent Beam to the MLF Target by
3-GeV Synchrotron (January 10)
The 7th external expert panel meeting

MLF School 2014 (December 16-19)
The 2nd MLF School for experiencing neutron andmuon experiments was held at the MLF. It was for graduate students, young researchers and others who are
new to the MLF and interested in its experiments. There
were 22 participants including some from overseas.

The acceleration of pulsed proton beams to 1-MW
equivalent, the designed value, was successfully
demonstrated at the J-PARC’s second accelerator, the
3-GeV synchrotron (Rapid Cycling Synchrotron: RCS).
Extracting the beams without significant beam losses
was also successful. Further beam studies would be
carried out in order to increase the proton beam powerin stages and eventually achieve a stable 1 MW beam
supply to users.

Number of particles / pulse (×1013)

1MW equivalent pulsed beams

Participants of the school and J-PARC staff

9
8
7
6

Number ofparticles per
pulse

Corresponding
power value
in 25 Hz operation

8.41×1013
7.86×1013
6.87×1013
5.80×1013
4.73×1013

1010 kW944 kW
825 kW
696 kW
568 kW

5
4

acceleration

3

8.41×1013
7.86×1013
6.87×1013
5.80×1013
4.73×1013

2
1
0
-2 0

2

4

6

8 10 12 14 16 18 20 22

Time (ms)Injection
Values on RCS current monitor
Horizonral axis: time (ms)Vertical axis: Number of particles per pulse (×1013)

Extraction

Events

J-PARC Annual Report 201466

SAT Technology Showcase 2015
(January 21)

Second Symposium on Safety inAccelerator Facilities (March 6)

This event was held at the Tsukuba International
Congress Center by the Science Academy of Tsukuba(SAT) aiming to provide a venue for networking,exchange of information and other beneficial interaction among researchers and engineers in a wide rangeof fields. J-PARC Center showcased its facilities andcovered related topics using models, panels, and PR
DVDs.

The J-PARC Center held this symposium gathering approximately 120 participants, about half ofwhom were from outside of the organization, including
persons in charge of accelerator safety at universities
and accelerator facilities inside and outside of Japan.
Information was exchanged about the recovery and thelessons learned from the J-PARC incident, and about
the best approaches to ensure safety when using accelerator facilities.

At the J-PARC booth
The symposium at the auditorium of the Nuclear Science Research Institute

6th MLF Symposium (March 17-18)
This symposium was held jointly with other events such as the Science Festa of the Instituteof Materials Structure Science of KEK and Photon Factory Symposium. Over 570 participants
took part in the event. At the MLF symposium, there were reports on the efforts to increase
beam intensity and related topics, and presentations on the results of user experiments.

Participants of three meetings

J-PARC Annual Report 2014

Events67

Science Cafe in Ricotti (March 14)
Dr. Shinichi Sakamoto, a J-PARC’s public relations
advisor, and Professor Toru Ishigaki of the Frontier
Research Center for Applied Atomic Sciences, Ibaraki
University, provided a general introduction to the typesof research that can be done using neutrons, and how
the results of that research are useful in our daily life
and instruments.

Science cafe

Visitors
David MacFarlane and others, Committee member of
the Japan/US Cooperation Program in the Field of HighEnergy Physics (April 26)
Genichiro Fukuchi and others, Members of Ibaraki
Prefectural Assembly (May 21)
Yves Brèchet, Haut-commissaire à l’énergie atomique,France (May 27)
Delegation from the National Environment Agency ofSingapore (May 27)
Mikito Kusuda, Vice Governor of Ibaraki Prefecture (May28)
Hakubun Shimomura, Minister of Education, Culture,
Sports, Science and Technology (July 7)
Tsutomu Tomioka, Parliamentary Vice-Minister, MEXT
(August 6)
Harriet Kung, Associate Director of Science for Basic
Energy Sciences, US Department of Energy, Chi-Chang
Kao, Director, SLAC National Accelerator Laboratory,

and others (October 21)
Kwadwo Osseo-Asare, Professor, Pennsylvania State
University (November 7)
Bonnie Jenkins, Ambassador, Coordinator for Threat
Reduction Programs in the Bureau of International
Security and Nonproliferation, U.S. Department of Stateand Sugeng Sumbarjo, Acting Deputy Chairman forLicensing and Inspection, Indonesia Nuclear Energy
Regulatory Agency (BAPETEN) (December 4)

Events

J-PARC Annual Report 2014

68

There were 3,136 visitors to J-PARC for the period from April, 2014, to the end of March, 2015.
In FY2014, the number of visitors increased by 46% compared to the previous fiscal year.

ln-house

Public Officers

3%

VIP, lawmakers

Foreigners
15%
3%

24%

Junior-high/High school
students, teachers

8%
14%

Business
9%
Local residents

University students,
experts

23%
Media 1%

Publications

Publications

J-PARC Annual Report 2014

70(A) Publications in Periodical Journals
A-001
Sasa, T.
A Study on accelerator-driven transmutation
system in JAEAAAPPS Bulletin, Vol 24, 13 (2014)

A-010
Qasim, I. et al.
Soft ferromagnetism in mixed valence Sr1xLaxTi0.5Mn0.5O3 perovskites
Dal. T., Vol 43, 6909 (2014)

Study on Thermo-mechanically Controlled
Processing of Steel using Neutron
Diffraction/ 中性子回折を用いた鉄鋼の加工熱処

A-002
Sakuma, F. et al.
A SEARCH FOR DEEPLY-BOUND KAONICNUCLEAR STATES BY IN-FLIGHT 3He(K−, n)
REACTION AT J-PARC
Acta Phys. Pol. B Vol. 45, p. 767

A-011
Aoki, S. et al.
Review of lattice results concerning
lowenergy particle physics
Eur. Phys. J. C Vol. 74, p. 2890

A-019
Shinohara, T.
Development of the Magnetic Field Imaging
using Polarized Pulsed Neutrons/ 偏極パルス

A-003
Ohnishi, H. et al.
A SEARCH FOR Φ MESON NUCLEUS BOUND
STATE USING ANTIPROTON ANNIHILATIONON NUCLEUS
Acta Phys. Pol. B Vol. 45, p. 819
A-004
Ohisa, S. et al.
Precise Evaluation of Angstrom-Ordered
Mixed Interfaces in Solution-Processed
OLEDs by Neutron Reflectometry
Ad. Mater. Interfaces., Vol 1, 1400097 (2014)
A-005
Toh, Y. et al.
Synergistic Effect of Combining Two
Nondestructive Analytical Methods forMultielemental Analysis
Anal. Chem., Vol 86, 12030 (2014)

A-013
Purevjav, N. et al.
Hydrogen site analysis of hydrous
ringwoodite in mantle transition zone bypulsed neutron diffraction
Geophys. Res. Lett., Vol 41, 6718 (2014)
A-014
Nozaki, H.
Ion Conducting Behavior in Secondary
Battery Materials Detected by Quasielastic
Neutron Scattering Measurements/ 中性子準

弾性散乱による電池材料中のイオン拡散解析 ( 特集中性子の産業利用 )A-015
Kume, T. et al.
Structural Change of Human Stratum
Corneum by the Treatment of Surfactant
Solutions Studied using Neutron Scattering/
界面活性剤処理によるヒト皮膚角層の構造変化のA-007
Akutsu, K. et al.
Application and Outlook of the Pulsed
Neutron Beam at J-PARC (1)Introduction of
Neutron Beam and Neutron Crystallography
at J-PARC/J-PARC におけるパルス中性子ビーム

中性子散乱解析 ( 特集中性子の産業利用 )Bunseki, Vol 2014, 617 (2014)

ンレス鋼の相応力に関する研究の利用と展望 (1) 中性子ビームの特徴と結晶構造解析

Hamon, Vol 24, 15 (2014)

A-009
Fujii, K. et al.
New Perovskite-Related Structure Family of
Oxide-Ion Conducting Materials NdBaInO4
Chem. Mater., Vol 26, 2488 (2014)

中性子を用いた磁場イメージング法の開発

A-020
Nakajima, K. et al.
Development of a Chopper Spectrometerwith a Pulse-shaping Chopper at a Pulsed
Source/ パルス中性子源におけるダブルディスク
チョッパー型分光器の実用化

Hamon, Vol 24, 115 (2014)
A-021
Iimura, S.
Switching of Intra-orbital Spin Excitations
in Electron-doped Iron Pnictide
Superconductors/ 電子ドープ型鉄系超伝導体における軌道内スピン励起のスイッチング

Hamon, Vol 24, 121 (2014)
A-022
Oku, T. et al.
Development of ³He Neutron Spin Filter for
the Application at an Intense Pulsed Neutron
Source Facility / 大強度パルス中性子源施設における 3He 中性子スピンフィルターの実用化研究
Hamon, Vol 24, 250 (2014)
A-023
Takata, S. et al.
The Small and Wide Angle Neutron
Scattering Instrument TAIKAN at J-PARC/ 中性子実験装置 J-PARC 編 (1) 小角散乱装置「中性子

小角・広角散乱装置 ( 大観 )」に関してHamon, Vol 24, 281 (2014)
A-016
Yun, W.
A Study on Phase Stress of Centrifugally
Cast Duplex Stainless Steel by Neutron
Diffraction/ 中性子回折による遠心鋳造二相ステ
Hamon, Vol 24, 28 (2014)

A-008
Sakaguchi, Y. et al.
Studies of silver photodiffusion dynamics
in Ag/GexS1−x (x = 0.2 and 0.4) films using
neutron reflectometry
Can. J. Phys., Vol 92, 654 (2014)

Hamon, Vol 24, 40 (2014)

Hamon, Vol 24, 100 (2014)
A-012
Futakawa, M. et al.
Cavitation erosion induced by proton beam
bombarding mercury target for high-power
spallation neutron sources
Exp. Therm. Fluid Sci., Vol 57, 365 (2014)

Hamon, Vol 24, 6 (2014)
A-006
Yamaguchi, T. et al.
Neutron diffraction study on very high elasticstrain of 6% in an Fe3Pt under compressive
stressAppl. Phys. Lett., Vol 104, 231908 (2014)

理に関する研究

A-017
Sueyoshi, H. et al.

中性子解析技術を活用した鉄鋼材料研究 : 中性子その場回折 , 小角散乱 , 残留応力解析 Steel

Research using Neutron Beam Techniques/ ～ In-situ Neutron Diffraction, Small-angle
Neutron Scattering and Residual Stress
Analysis ～Hamon, Vol 24, 34 (2014)
A-018
Tomota, Y.

A-024
Yamada, N. et al.
Neutron Reflectometers in J-PARC/ 中性子実
験装置 J-PARC 編 (2) 中性子反射率計 J-PARC における中性子反射率計 SOFIA/ 写楽
Hamon, Vol 24, 288 (2014)
A-025
Okuchi, T. et al.
Structure refinement of sub-cubic-mm
volume sample at high pressures by pulsed
neutron powder diffraction: application tobrucite in an opposed anvil cellHigh Pressure Res., Vol 34, 273 (2014)
A-026
Komatsu, K. et al.
Performance of ceramic anvils for highpressure neutron scattering

J-PARC Annual Report 2014

Publications

71
High Pressure Res., Vol 34, 494 (2014)
A-027
Kurimoto, Y. et al.
Precise Current Control in Accelerator
Magnets with a Digital Feedback System
IEEE Trans. Nucl. Sci. Vol. 61, 546
A-028
Shirakabe, Y. et al.
Study of Transient Ripple in SynchrotronIEEE Trans. Nucl. Sci. Vol. 61, 2579
A-029
Shirakabe, Y. et al.
Study of Transient Ripple in Synchrotron –Practical Applications
IEEE Trans. Nucl. Sci. Vol. 61, 2588
A-030
Okamura, K. et al.
Development of a Compact Switching Power
Supply for an Induction Synchrotron Utilizing
a SiC-JFETIEEJ Trans. Fundam. Mater. Vol. 134, p. 402
A-031
Kai, T.
Recent progress of resonance neutron
imaging
Isotope News. Vol 727, 16 (2014)
A-032
Ishii, K. et al.
Observation of electron dynamics by use of
three kinds of quantum beams
Isotope News. Vol 728, 10 (2014)
A-033
Sato, T. et al.
Local atomic structural investigations ofprecursory phenomenon of the hydrogen
release from LiAlD4
J. Alloy. Compd., Vol 586, 244 (2014)
A-034
Bang, J. et al.
Hydrogen Ordering and New Polymorph ofLayered Perovskite Oxyhydrides: Sr2VO4−xHx
J. Am. Chem. Soc., Vol 136, 7221(2014)
A-035
Ohhara, T.
Recent Advance of the Neutron Crystal
Chemistry by using High Intensity Neutron
Beam at J-PARC/J-PARC の大強度中性子を用いた結晶化学の新展開

J. Crystall. Soc.Jpn., Vol 56, 301(2014)
A-036
Naoe, T. et al.
Experimental and numerical investigationsof liquid mercury droplet impacts
J. Fluid Sci. Tech., Vol 9, JFST0002 (2014)
A-037
Okada, S. et al.

High-Resolution Kaonic-Atom X-ray
Spectroscopy with Transition-Edge-Sensor
Microcalorimeters
J. Low Temp. Phys. Vol. 176, p. 1015
A-038
Meigo, S.-i.
Conceptual design of proton beam transportsystem for ADS facilities at J-PARC
J. Nucl. Mater., Vol 450, 8 (2014)
A-039
Saito, S. et al.
Bend-fatigue properties of JPCA andAlloy800H specimens irradiated in a
spallation environment
J. Nucl. Mater., Vol 450, 27-31 (2014)
A-040
Makimura, S. et al.
Remote-controlled non-destructive
measurement for thermal conductivity ofhighly radioactive isotropic graphite usedas the muon production target at J-PARC/
MUSE
J. Nucl. Mater., Vol 450, 110-116 (2014)
A-041
Ooi, M. et al.
Development of Au–In–Cd decoupler by a
hot isostatic pressing (HIP) technique forshort pulsed spallation neutron source
J. Nucl. Mater., Vol 450, 117 (2014)
A-042
Naoe, T. et al.
Damage inspection of the first mercury
target vessel of JSNS
J. Nucl. Mater., Vol 450, 123 (2014)
A-043
Meigo, S. et al.
Radiation damage and lifetime estimationof the proton beam window at the Japan
Spallation Neutron Source
J. Nucl. Mater., Vol 450, 141 (2014)
A-044
Riemer, B. W. et al.
Small gas bubble experiment for mitigationof cavitation damage and pressure waves inshort-pulse mercury spallation targets
J. Nucl. Mater., Vol 450, 192-203 (2014)
A-045
Kikuchi, K. et al.
HCM12A Cr-rich oxide layer investigation
using 3D atom probe
J. Nucl. Mater., Vol 450, 237-243 (2014)
A-046
Kameda, Y. et al.
Hydration Structure of CO2-Absorbed
2-Aminoethanol Studied by Neutron
Diffraction with the 14N/15N Isotopic
Substitution Method
J. Phys. Chem. B., Vol 118, 1403 (2014)

A-047
Abe, H. et al.
Direct Evidence of Confined Water in
Room-Temperature Ionic Liquids byComplementary Use of Small-Angle X-ray
and Neutron Scattering
J. Phys. Chem. Lett., Vol 5, 1175 (2014)
A-048
Sugai, I. et al.
Sputtering angle effects by Kr mixing in N+
ion beam on the lifetime of nitrided carbon
stripper foils
J. Radioanal. Nucl. Chem. Vol. 299, p. 1023
A-049
Saha, P. K. et al.
Quantitative monitoring of the stripper
foil degradation in the 3-GeV rapid cycling
synchrotron of the Japan proton accelerator
research complex
J. Radioanal. Nucl. Chem. Vol. 299, p. 1041
A-050
Qasim, I. et al.
Structural and electronic properties of Sr1−
xCaxTi0.5Mn0.5O3
J. Solid State Chem., Vol 213, 293 (2014)
A-051
Kuo, L. et al.
Syntheses and properties of a family of newcompounds RE3Sb3Co2O14 (RE=La, Pr, Nd, Sm–
Ho) with an ordered pyrochlore structure
J. Solid State Chem., Vol 217, 80 (2014)
A-052
Iizuka, R. et al.
Phase transitions and hydrogen bonding indeuterated calcium hydroxide: Highpressureand high-temperature neutron diffraction
measurements
J. Solid State Chem., Vol 218, 95 (2014)
A-053
Kameda, Y. et al.
Neutron Diffraction Study on the Structureof Aqueous LiNO3 Solutions
J. Solution Chem., Vol 43, 1588 (2014)
A-054
Uota, M. et al.
Beam Dependence of the Vacuum Pressurein J-PARC Main Ring Synchrotron
J. Vac. Soc. Jpn. Vol. 57, p. 111
A-055
Kamiya, J. et al.
Design consideration of beam duct for
quadrupole correctors in J-PARC RCS
J. Vac. Soc. Jpn.,4 Vol 57, 131-135 (2014)
A-056
Tamura, F.
Multiharmonic beam loading compensationin the J-PARC synchrotrons/ J-PARC シンクロ
トロンにおけるマルチハーモ ニックビームロー

Publications

J-PARC Annual Report 201472
ディング補償

Kasokuki, Vol 11, 78 (2014)
A-057
Phan, C. M. et al.
Synergistic Adsorption of MIBC/CTAB Mixture
at the Air/Water Interface and Applicabilityof Gibbs Adsorption Equation
Langmuir., Vol 30, 5790 (2014)
A-058
Horinouchi, A. et al.
Aggregation States of Polystyrene at
Nonsolvent Interfaces
Langmuir., Vol 30, 6565 (2014)
A-059
Clulow, A. J. et al.
Time-Resolved Neutron Reflectometry andPhotovoltaic Device Studies on Sequentially
Deposited PCDTBT-Fullerene Layers
Langmuir., Vol 30, 11474 (2014)
A-060
Harjo, S. et al.
Engineering & Related Studies at J-PARC
Mater. Sci. Forum., Vol 777, 12 (2014)
A-061
Harjo, S. et al.
Residual Strains in ITER Conductors by
Neutron Diffraction
Mater. Sci. Forum., Vol 777, 84 (2014)
A-062
Suzuki, H. et al.
Influence of Beam Divergence on PseudoStrain Induced in Time-of-Flight Neutron
Diffraction
Mater. Sci. Forum., Vol 777, 105 (2014)
A-063
Abe, J. et al.
Strain Analysis in Geological Materials
Using Neutron Diffraction and AE Signal
Measurement at J-PARC/BL19 “TAKUMI”
Mater. Sci. Forum., Vol 777, 219 (2014)
A-064
Okamura, K. et al.
Beam Acceleration Experiment with SiC
Based Power Supply and the Next Generation
SiC-JFET Package
Mater. Sci. Forum., Vol 778, p. 883
A-065
Ito, T. et al.
Utilization of an event-recording system forneutron diffraction experiments
Mater. Sci. Forum., Vol 783-786, 2071 (2014)
A-066
Zhe, J. X. et al.
Recent R&D on Superconducting Wires forHigh-Field Magnet
Mater. Sci. Forum., Vol 783-786, 2081 (2014)

A-067
Wan, T. et al.
Cavitation Damage Evaluation Using Laser
Impacts
Mater. Trans., Vol 55, 1024 (2014)
A-068
Ikeda, K. et al.
Local Structural Analysis on Decomposition
Process of LiAl(ND2)4Mater. Trans., Vol 55, 1129 (2014)
A-069
Suzuki, H. et al.
Measuring strain and stress distributions
along rebar embedded in concrete using
time-of-flight neutron diffraction
Measurement Science and Technology., Vol 25,
025602 (2014)
A-070
Su, Y. et al.
Microstructural Changes by Annealing in
Ultrafine-Grained Electrodeposited Pure Iron
Metall and Mat Trans A., Vol 45, 990 (2014)
A-071
Tomota, Y. et al.
Stress Corrosion Cracking Behavior at Inconeland Low Alloy Steel Weld Interfaces
Metall and Mat Trans A., Vol 45, 6103 (2014)
A-072
Ishii, K. et al.
High-energy spin and charge excitations
in electron-doped copper oxide
superconductors
Nat Commun., Vol 5, 3714 (2014)
A-073
Machida, A. et al.
Site occupancy of interstitial deuterium
atoms in face-centred cubic iron
Nat Commun., Vol 5, 5063 (2014)

J-PARC/MLF/ANNRI
Nucl. Data Sheets., Vol 119, 48 (2014)
A-078
Harada, H. et al.
Capture Cross-section Measurement of
241
Am(n, γ) at J-PARC/MLF/ANNRI
Nucl. Data Sheets., Vol 119, 61 (2014)
A-079
Hori, J. et al.
Measurements of Capture Gamma Rays fromthe Neutron Resonances of 74Se and 77Se at
the J-PARC/MLF/ANNRI
Nucl. Data Sheets., Vol 119, 128 (2014)
A-080
Kino, K. et al.
Measurement of Capture Gamma Rays from99
Tc Neutron Resonances at the J-PARC/
ANNRI
Nucl. Data Sheets., Vol 119, 140 (2014)
A-081
Nakamura, S. et al.
Cross Section Measurements of theRadioactive 107Pd and Stable 105,108Pd Nuclei
at J-PARC/MLF/ANNRI
Nucl. Data Sheets., Vol 119, 143 (2014)
A-082
Kimura, A. et al.
Measurements of Neutron Capture Cross
Sections of 112Sn and 118Sn with J-PARC/ MLF/
ANNRI
Nucl. Data Sheets., Vol 119, 150 (2014)
A-083
Katabuchi, T. et al.
A New Signal Processing Technique for
Neutron Capture Cross Section Measurement
Based on Pulse Width Analysis
Nucl. Data Sheets., Vol 119, 398 (2014)

A-074
Hiraishi, M. et al.
Bipartite magnetic parent phases in the iron
oxypnictide superconductor
Nat Phys., Vol 10, 300 (2014)

A-084
Matsumura, H. et al.
Material Activation Benchmark Experiments
at the NuMI Hadron Absorber Hall in
FermilabNucl. Data Sheets., Vol 120, 219 (2014)

A-075
Igashira, M. et al.
A Nuclear Data Project on Neutron Capture
Cross Sections of Long-Lived Fission Products
and Minor Actinides
Nucl. Data Sheets., Vol 118, 72 (2014)

A-085
Kawasaki, T. et al.
Detector system of the SENJU single-crystal
time-of-flight neutron diffractometer at
J-PARC/MLF
Nucl. Instrum. Meth. A, Vol 735, 444 (2014)

A-076
Iwamoto, H. et al.
Sensitvity and Uncertainty Analysis for a
Minor-actinide Transmuter with JENDL-4.0
Nucl. Data Sheets., Vol 118, 519 (2014)

A-086
Koseki, K.
Development of the 320 kA pulsed magnetic
horn power supply with a novel energy
recovery system for the T2K experiment
Nucl. Instrum. Meth. A, Vol 735, 633 (2014)

A-077
Hirose, K. et al.
Cross Section Measurement of 237Np(n,γ) at

A-087
Kino, K. et al.

J-PARC Annual Report 2014

Publications

73
Energy resolution of pulsed neutron beamprovided by the ANNRI beamline at the
J-PARC/MLF
Nucl. Instrum. Meth. A, Vol 736, 66 (2014)
A-088
Ao, H. et al.
Impedance matching of pillbox-type RF
windows and direct measurement of theceramic relative dielectric constantNucl. Instrum. Meth. A, Vol 737, 65 (2014)
A-089
Nakamura, M. et al.
Feasibility demonstration of a new Fermi
chopper with supermirror-coated slit
packageNucl. Instrum. Meth. A, Vol 737, 142 (2014)
A-090
Nakamura, T. et al.
A scintillator-based detector with sub100- μm spatial resolution comprising afibreoptic taper with wavelength-shifting
fibre readout for time-of-flight neutron
imaging
Nucl. Instrum. Meth. A, Vol 737, 176 (2014)

Ribbon thickness dependence of theMagnetic Alloy core characteristics inthe accelerating frequency region of the
J-PARC synchrotrons
Nucl. Instrum. Meth. A, Vol 749, 84 (2014)
A-097
Ito, T. U. et al.
Online full two-dimensional imaging ofpulsed muon beams at J-PARC MUSE using
a gated image intensifier
Nucl. Instrum. Meth. A, Vol 754, 1 (2014)
A-098
Koseki, K. et al.
Snubber-less NPC inverter by a novel
reduction technique of parasitic
inductance for magnet power supplies
Nucl. Instrum. Meth. A, Vol 761, 86 (2014)
A-099
Sako, H. et al.
Development of a prototype GEM TPC
with a gating grid for an H-dibaryon searchexperiment at J-PARC
Nucl. Instrum. Meth. A, Vol 763, 65 (2014)

A-091
Koseki, K. et al.
The fast extraction kicker for J-PARC with anovel pulse compression system
Nucl. Instrum. Meth. A, Vol 739, 63 (2014)

A-100
Kamiya, J. et al.
Beam loss reduction by magnetic shielding
using beam pipes and bellows of soft
magnetic materials
Nucl. Instrum. Meth. A, Vol 763, 329 (2014)

A-092
Nakamura, T. et al.
A position-sensitive tubular
scintillatorbased detector as an alternative
to a 3He gas- based detector for neutronscattering instruments
Nucl. Instrum. Meth. A, Vol 741, 42 (2014)

A-101
Nakamura, T. et al.
Neutron-sensitive ZnS/10B2O3 ceramic
scintillator detector as an alternative to a
3
He-gas-based detector for a plutonium
canister assay system
Nucl. Instrum. Meth. A, Vol 763, 340 (2014)

A-093
Shobuda, Y.
Analytical evaluations of coupling
impedances of resistive and magnetic
bellows
Nucl. Instrum. Meth. A, Vol 741, 177 (2014)

A-102
Katabuchi, T. et al.
Pulse-width analysis for neutron capture
cross-section measurement using an
NaI(Tl) detector
Nucl. Instrum. Meth. A, Vol 764, 369 (2014)

A-094
Tremsin, A. S. et al.
Neutron resonance transmission
spectroscopy with high spatial and energy
resolution at the J-PARC pulsed neutron
sourceNucl. Instrum. Meth. A, Vol 746, 47 (2014)

A-103
Yamaga, T. et al.
Development of PID counter for charmed
baryon spectroscopy experiment at J-PARC
Nucl. Instrum. Meth. A, Vol 766, 36 (2014)

A-095
Koseki, K. et al.
Development of a magnet power supply
with sub-ppm ripple performance for
J-PARC with a novel common-mode
rejection method with an NPC inverter
Nucl. Instrum. Meth. A, Vol 747, 24 (2014)
A-096
Nomura, M. et al.

A-104
Fang, Z. et al.
Auto-tuning systems for J-PARC LINAC RF
cavities
Nucl. Instrum. Meth. A, Vol 767, 135 (2014)
A-105
Sugai, I. et al.
Performance characteristics of HBC
stripper foils irradiated by 650 keV H− andhigh intensity DC ion beams
Nucl. Instrum. Meth. B, Vol 328, 70

A-106
Sako, H. et al.
Towards the heavy-ion program at J-PARC
Nucl. Phys. A Vol. 931, p. 1158
A-107
Nishikawa, K.
Long baseline accelerator neutrino
experiments
Nuovo Cimento C Vol. 37, p. 75
A-108
Sugimura, H. et al.
Search for 6 ΛH hypernucleus by the 6Li(π−,K+) reaction at pπ− = 1.2 GeV/c
Phys. Lett. B Vol. 729, p. 39
A-109
Amemiya, K. et al.
Twisted magnetic structure in
ferromagnetic ultrathin Ni films inducedby magnetic anisotropy interaction with
antiferromagnetic FeMn
Phys. Rev. B., Vol 89, 054404 (2014)
A-110
Hase, M. et al.
Experimental confirmation of spin gap
in antiferromagnetic alternating spin3/2 chain substances RCrGeO5 (R = Y or
154Sm) by inelastic neutron scattering
Phys. Rev. B., Vol 90, 024416 (2014)
A-111
Sim, H. et al.
High-resolution structure studies andmagnetoelectric coupling of relaxor
multiferroic Pb(Fe0.5Nb0.5)O3
Phys. Rev. B., Vol 90, 214438 (2014)
A-112
Sekihara, T. et al.
Determination of compositeness of theΛ(1405) resonance from its radiative decay
Phys. Rev. C Vol. 89, 025202
A-113
Moritsu, M. et al.
High-resolution search for the Θ+
pentaquark via a pion-induced reaction at
J-PARC
Phys. Rev. C Vol. 90, 035205
A-114
Abe, K. et al.
Measurement of the intrinsic electron
neutrino component in the T2K neutrino
beam with the ND280 detector
Phys. Rev. D Vol. 89, 092003
A-115
Abe, K. et al.
Measurement of the inclusive νμ charged
current cross section on iron andhydrocarbon in the T2K on-axis neutrino
beam
Phys. Rev. D Vol. 90, 052010

Publications

J-PARC Annual Report 2014

74
A-116
Abe, K. et al.
Measurement of the neutrino-oxygen
neutral-current interaction cross section
by observing nuclear deexcitation γ rays
Phys. Rev. D Vol. 90, 072012
A-117
Nakagawa, H. et al.
Local dynamics coupled to hydration water
determines DNA-sequencedependent
deformability
Phys. Rev. E., Vol 90, 022723 (2014)
A-118
Abe, K. et al.
Observation of Electron Neutrino
Appearance in a Muon Neutrino Beam
Phys. Rev. Lett. Vol. 112, 061802
A-119
Soda, M. et al.
Spin nematic interaction in multiferroic
compound Ba2CoGe2O7
Phys. Rev. Lett., Vol 112, 127205 (2014)
A-120
Abe, K. et al.
Precise Measurement of the Neutrino
Mixing Parameter θ23 from Muon Neutrino
Disappearance in an Off-Axis Beam
Phys. Rev. Lett. Vol. 112, 181801
A-121
Tomiyasu, K. et al.
Spin-Orbit Fluctuations in Frustrated
Heavy-Fermion Metal LiV2O4
Phys. Rev. Lett., Vol 113, 236402 (2014)
A-122
Abe, K. et al.
Measurement of the Inclusive Electron

Neutrino Charged Current Cross Section
on Carbon with the T2K Near Detector
Phys. Rev. Lett. Vol. 113, 241803
A-123
Shobuda, Y. et al.
Impedance of a ceramic break and its
resonance structures
Phys. Rev. Spec. Top - Ac., Vol 17, 091001(2014)
A-124
Shobuda, Y. et al.
Optimization of electrode shape forstripline beam position monitors
Phys. Rev. Spec. Top - Ac., Vol 17, 092801(2014)
A-125
Yamada, N.
Structure Analysis of Polymer Thin Film
Using Neutron Reflectometry/ 中性子反射率
法による高分子薄膜の構造解析

POLYMERS/ 高分子 ., Vol 63, 110-111 (2014)
A-126
Ichikawa, Y. et al.
Inclusive spectrum of the d(π+, K+) reaction
at 1.69 GeV/c
Prog. Theor. Exp. Phys. 2014, 101D03
A-127
Koseki, K. et al.
Open-loop correction for an eddy current
dominated beam-switching magnet
Rev. Sci. Instrum. Vol. 85, 043301
A-128
Koseki, K.
Capacitive energy storage and recovery forsynchrotron magnets
Rev. Sci. Instrum. Vol. 85, 063304

A-129
Sano-Furukawa, A. et al.
Six-axis multi-anvil press for high-pressure,high-temperature neutron diffraction
experiments
Rev. Sci. Instrum., Vol 85, 113905 (2014)
A-130
Ueno, A. et al.
Dependence of beam emittance on plasma
electrode temperature and rfpower andfilter-field tuning with centergapped rodfilter magnets in J-PARC rf-driven H− ionsourceRev. Sci. Instrume., Vol 85, 02B133 (2014)
A-131
Hambsch, M. et al.
Improved stability of non-ITO stacked
electrodes for large area flexible organic
solar cells
Sol. Energ Mat. Sol. C., Vol 130, 182-190(2014)
A-132
Tsuchida, N. et al.
Stress-Strain Curves of Steels/ 鉄鋼材料の応力−ひずみ曲線

Tetsu-to-Hagane., Vol 100, 1191-1206 (2014)
A-133
Naoe, T. et al.
Pressure wave-induced cavitation erosionin narrow channel of stagnant mercury/ 静
止水銀中の狭隘部における圧力波誘起キャビ
テーション損傷

Transactions of the JSME/ 日本機械学会論文集 .,Vol 80, FE0025 (2014)

J-PARC Annual Report 2014

Publications

75(C) Conference Reports and Books
C-001
Xiong, Z. H. et al.
Very High Cycle Fatigue in Pulsed HighPower Spallation Neutron Source
Adv. Mat. Res., Vol 891, 536-541 (2014)
C-002
Tatsumoto, H. et al.
Forced convection heat transfer
of saturated liquid hydrogen inverticallymounted heated pipes
AIP Conf. Proc., Vol 1573, 44-51 (2014)
C-003
Tatsumoto, H. et al.
Operational characteristics of the
J-PARC cryogenic hydrogen system for a
spallation neutron source
AIP Conf. Proc., Vol 1573, 66-73 (2014)
C-004
Naoe, T. et al.
Dynamic Behavior of Liquid Mercury
Droplets Colliding with a Solid Surface
Appl. Mech. Mater., Vol 566, 391-396 (2014)
C-005
Wan, T. et al.
Damage Evaluation by Impulsive
Response in Structure Filled with LiquidAppl. Mech. Mater., Vol 566, 629-636 (2014)
C-006
Hashimoto, T. et al.
−
A search for the K pp bound state in the
3He(K− in−flight, n) reaction at J-PARC
EPJ Web Conf. Vol. 66, 09008
C-007
Sako, H. et al.
Search for H-dibaryon at J-PARC with aLarge Acceptance TPC
EPJ Web Conf. Vol. 66, 09015
C-008
Sugimura, H. et al.
Study on 6 ΛH hypernucleus by the (π−, K+)
reaction at J-PARC
EPJ Web Conf. Vol. 66, 09017
C-009
Sada, Y. et al.
Search for the K−pp bound state via theinflight 3He(K−, n) reaction
EPJ Web Conf. Vol. 81, 02016
C-010
Takayanagi, T. et al.
Design and Preliminary Performanceof the New Injection Shift Bump Power
Supply at the J-PARC 3-GeV RCSIEEE Trans. Appl. Supercond., Vol 24, 0503504(2014)

C-011
Tani, N. et al.
Field Measurement of Pulse Steering
Magnet for J-PARC 3 GeV Rapid Cycling
SynchrotronIEEE Trans. Appl. Supercond., Vol 24, 0504004(2014)
C-012
Takayanagi, T. et al.
Comparison of the pulsed power supply
systems using the PFN switching capacitor
method and the IGBT chopping method
for the J-PARC 3-GeV RCS injection system
IEEE Trans. Appl. Supercond., Vol 24, 3800905(2014)C-013
Su, Y. et al.
In Situ Observations of Microstructural
Evolution During Annealing or
Deformation in an Electro-Deposited FineGrained Iron
In-situ Studies with Photons, Neutrons andElectrons Scattering II, 131 (2014)
C-014
Ono, K. et al.
Observation of spin-wave dispersion in
Nd-Fe-B magnets using neutron Brillouinscattering
J. Appl. Phys., Vol 115, 17A714(3) (2014)
C-015
Toh, K. et al.
Evaluation of two-dimensional multiwire
neutron detector with individual line
readout under pulsed neutron irradiation
J. Instrum., Vol 9, C11019 (2014)
C-016
Nakamura, T. et al.
An empirical formula for calculating the
spatial resolution of a wavelength-shifting
fibre detector coupled with a ZnS/6LiF
scintillator for detecting thermal neutrons
J. Instrum., Vol 9, C11020 (2014)
C-017
Hosokawa, S. et al.
A combination of anomalous x-ray
scattering and neutron diffraction forstructural characterizations of Zr63Ni25Al12
metallic glass
J. Phy.; Conf. Ser.,Vol 502, 012023 (2014)
C-018
Nakamura, J. et al.
Ultra Slow Muon Microscope at MUSE/
JPARC
J. Phy.; Conf. Ser.,Vol 502, 012042 (2014)
C-019
Itoh, S. et al.

Neutron Brillouin Scattering Experimentswith Pulsed Neutrons on High Resolution
Chopper Spectrometer HRC
J. Phy.; Conf. Ser.,Vol 502, 012043 (2014)
C-020
Itoh, S. et al.
Spin Waves in Ferromagnetic Phase of
MnPJ. Phy.; Conf. Ser.,Vol 502, 012044 (2014)
C-021
Yokoo, T. et al.
Dynamical properties of spins and holes incarrier doped quantum Haldane chain
J. Phy.; Conf. Ser.,Vol 502, 012045 (2014)
C-022
Yokoo, T. et al.
Construction of Polarized Inelastic
Neutron Spectrometer in J-PARC
J. Phy.; Conf. Ser.,Vol 502, 012046 (2014)
C-023
Satoh, S. et al.
Detector development for a high-flux
neutron reflectometer
J. Phy.; Conf. Ser.,Vol 502, 012050 (2014)
C-024
Ohoyama, K. et al.
Concepts of Neutron Polarisation Analysis
Devices for a New Neutron Chopper
Spectrometer, POLANO, in J-PARC
J. Phy.; Conf. Ser.,Vol 502, 012051 (2014)
C-025
Torii, S. et al.
Improvement of Instrument Devices
for Super High Resolution Powder
Diffractometer at J-PARC
J. Phy.; Conf. Ser.,Vol 502, 012052 (2014)
C-026
Yonemura, M. et al.
Development of SPICA, New DedicatedNeutron Powder Diffractometer for Battery
StudiesJ. Phy.; Conf. Ser.,Vol 502, 012053 (2014)
C-027
Yonemura, M. et al.
Development of Spectroelectrochemical
Cells for in situ Neutron Reflectometry
J. Phy.; Conf. Ser.,Vol 502, 012054 (2014)
C-028
Miao, P. et al.
Structure analysis on small molecular
crystal by high resolution neutron powder
diffraction
J. Phy.; Conf. Ser.,Vol 502, 012055 (2014)

Publications

J-PARC Annual Report 2014

76
C-029
Kajimoto, R. et al.
Inelastic neutron scattering study ofphonon anomalies in La1.5Sr0.5NiO4J. Phy.; Conf. Ser.,Vol 502, 012056 (2014)
C-030
Masui, T. et al.
Quasielastic Neutron Scattering Study on
Polymer Nanocomposites
J. Phy.; Conf. Ser.,Vol 502, 012057 (2014)
C-031
Tominaga, T. et al.
Adsorption of water to double-network
polymers having a hierarchical structure
J. Phy.; Conf. Ser.,Vol 502, 012058 (2014)
C-032
Yasuyuki, S. et al.
Cooling Stability Test of MgB2 Wire
Immersed in Liquid Hydrogen under
External Magnetic Field
J. Phy.; Conf. Ser.,Vol 507, 022031 (2014)
C-033
Tatsumoto, H. et al.
Development of an experimental systemfor characterization of high-temperature
superconductors cooled by liquidhydrogen under the external magneticfield
J. Phy.; Conf. Ser.,Vol 507, 022042 (2014)

J. Phy.; Conf. Ser.,Vol 528, 012030 (2014)
C-039
Ino, T. et al.
Precision neutron flux measurement witha neutron beam monitor
J. Phy.; Conf. Ser.,Vol 528, 012039 (2014)
C-040
Nakamura, T. et al.
Development of a wavelengthshiftingfibre- based scintillator neutron
detector as an alternative to 3He at J-PARC/
MLF
J. Phy.; Conf. Ser.,Vol 528, 012042 (2014)
C-041
Nakamura, T. et al.
Development of a ZnS/10B2O3 scintillator
with low-afterglow phosphor
J. Phy.; Conf. Ser.,Vol 528, 012043 (2014)
C-042
Toh, K. et al.
Performance evaluation of high-pressure
MWPC with individual line readout underCf-252 neutron irradiation
J. Phy.; Conf. Ser.,Vol 528, 012045 (2014)
C-043
Yamauchi, I. et al.
Muon Knight shift in d-electron heavy
fermion compound Y0.95Sc0.05Mn2
J. Phy.; Conf. Ser.,Vol 551, 012002 (2014)

C-034
Hayashida, H. et al.
Development and demonstration of amulti-channel spheroidal focusing device
for neutron beams
J. Phy.; Conf. Ser.,Vol 528, 012007 (2013)

C-044
Sugiyama, J. et al.
Structural, magnetic, and diffusive natureof olivine-type NaxFePO4
J. Phy.; Conf. Ser.,Vol 551, 012012 (2014)

C-035
Sakurai, D. et al.
Development of a new neutron mirror
made of deuterated Diamond-like carbon
J. Phy.; Conf. Ser.,Vol 528, 012010 (2014)

C-045
Miyazaki, M. et al.
Spin dynamics of Mn pyrochlore lattice in
YMn2Zn20-xInx
J. Phy.; Conf. Ser.,Vol 551, 012019 (2014)

C-036
Sakai, K. et al.
Development of portable polarized 3He
neutron spin filter and its application tomagnetic field imaging at J-PARC
J. Phy.; Conf. Ser.,Vol 528, 012016 (2013)

C-046
Umegaki, I. et al.
In situ μ+SR measurements on thehydrogen desorption reaction ofmagnesium hydride
J. Phy.; Conf. Ser.,Vol 551, 012036 (2014)

C-037
Hayashida, H. et al.
Development and demonstration of insitu SEOP 3He spin filter system for neutron
spin analyzer on the SHARAKU polarized
neutron reflectometer at J-PARC
J. Phy.; Conf. Ser.,Vol 528, 012020 (2014)

C-047
Macrae, R. M. et al.
Paramagnetic muon states in mesoporous
carbon materials
J. Phy.; Conf. Ser.,Vol 551, 012040 (2014)

C-038
Mishima, K. et al.
Production of ultra cold neutrons by adoppler shifter with pulsed neutrons at
J-PARC

C-048
Pant, A. D. et al.
Muonium response to oxygen content inbiological aqueous solutions for cancer
research
J. Phy.; Conf. Ser.,Vol 551, 012043 (2014)

C-049
Miyake, Y. et al.
Current status of the J-PARC muon facility,
MUSE
J. Phy.; Conf. Ser.,Vol 551, 012061 (2014)
C-050
Kawamura, N. et al.
H line; a beam line for fundamental
physics study
J. Phy.; Conf. Ser.,Vol 551, 012062 (2014)
C-051
Kojima, K. M. et al.
New μ SR spectrometer at J-PARC MUSE
based on Kalliope detectors
J. Phy.; Conf. Ser.,Vol 551, 012063 (2014)
C-052
Strasser, P. et al.
Design and construction of the ultra-slow
muon beamline at J-PARC/MUSE
J. Phy.; Conf. Ser.,Vol 551, 012065 (2014)
C-053
Nakamura, J. at al.
Optimal crossed overlap of coherent
vacuum ultraviolet radiation and thermal
muonium emission for μSR with the Ultra
Slow Muon
J. Phy.; Conf. Ser.,Vol 551, 012066 (2014)
C-054
Okuda, T. et al.
Effects of Mn substitution on thethermoelectric properties of theelectrondoped perovskite Sr1-xLaxTiO3J. Phy.; Conf. Ser.,Vol 568, 022035 (2014)
C-055
Tatsumoto, H. et al.
Forced convection heat transfer from awire inserted into a vertically-mounted
pipe to liquid hydrogen flowing upward
J. Phy.; Conf. Ser.,Vol 568, 032017 (2014)
C-056
Yokoo, T. et al.
Spin and Hole Dynamics in Carrier-Doped
Quantum Haldane Chain
J. Phy.; Conf. Ser.,Vol 568, 042035 (2014)
C-057
Hashimoto, T. et al.
Search for the K−pp bound state via the
3He(K−, n) reaction at 1 GeV/c
J. Phy.; Conf. Ser.,Vol 569, 012080
C-058
Dot´e, A. et al.
Essential K− cluster “K−pp” studied with acoupled-channel Complex Scaling Method+ Feshbach method
J. Phy.; Conf. Ser.,Vol 569, 012084
C-059
Shirotori, K. et al.

J-PARC Annual Report 2014

Publications

77
Spectroscopy of charmed baryons at the
J-PARC high-momentum beam line
J. Phy.; Conf. Ser.,Vol 569, 012085
C-060
Kiyanagi, R. et al.
Proton Conduction Path in Rb3H(SeO4)2Studied by High Temperature Neutron
Single Crystal Diffraction
JPS Conf. Proc., Vol 1, 012034 (2014)
C-061
Sato, M. et al.
On the Superconducting Symmetry of
Fe-Based Systems —Impurity Effects andMicroscopic Magnetic Behavior—
JPS Conf. Proc., Vol 1, 014007 (2013)
C-062
Kawasaki, T. et al.
Single crystal neutron diffraction study ofhigh neutron absorbing compound EuGa4
JPS Conf. Proc., Vol 1, 014009 (2014)
C-063
Nakatani, T. et al.
Event Recording Data Acquisition System
and Experiment Data Management
System for Neutron Experiments at MLF,
J-PARCJPS Conf. Proc., Vol 1, 014010 (2013)
C-064
Oikawa, K. et al.
Study on the Pulse Shape of Thermal andCold Neutrons Provided by the Decoupled
Moderator of JSNSJPS Conf. Proc., Vol 1, 014012 (2014)
C-065
Oikawa, K. et al.
Instrument Design and Performance
Evaluation of a New Single Crystal Neutron
Diffractometer SENJU at J-PARC
JPS Conf. Proc., Vol 1, 014013 (2014)
C-066
Tominaga, T. et al.
SANS Study of Static Structure of The
Double Network Polymers
JPS Conf. Proc., Vol 1, 014014 (2014)
C-067
Harada, M. et al.
Performance of Optical Devices for EnergySelective Neutron Imaging in NOBORU at
J-PARCJPS Conf. Proc., Vol 1, 014015 (2014)
C-068
Iida, K. et al.
Energy- and Q-Resolution Investigationsof a Chopper Spectrometer 4SEASONS at
J-PARCJPS Conf. Proc., Vol 1, 014016 (2013)

C-069
Harjo, S. et al.
Deformation Behavior of An Austenitic
Steel by Neutron Diffraction
JPS Conf. Proc., Vol 1, 014017 (2014)
C-070
Nakamura, M. et al.
General Formulae for the Optimized
Design of Fermi Chopper Spectrometer
JPS Conf. Proc., Vol 1, 014018 (2013)
C-071
Nagamine, K. et al.
Past, Present and Future of Ultra-Slow
Muons
JPS Conf. Proc., Vol 2, 010001 (2014)
C-072
Miyake, Y. et al.
Ultra Slow Muon Project at J-PARC MUSEJPS Conf. Proc., Vol 2, 010101 (2014)
C-073
Nagatomo, T. et al.
Construction of Ultra Slow Muon BeamLine at J-PARC
JPS Conf. Proc., Vol 2, 010102 (2014)
C-074
Ikedo, Y. et al.
U-Line at MLF/J-PARC for Ultra Slow Muon
Microscopy
JPS Conf. Proc., Vol 2, 010103 (2014)
C-075
Makimura, S. et al.
Development of Manufacturing Methodof Highly Pure Tungsten Foil for Thermal
Muonium Generation
JPS Conf. Proc., Vol 2, 010104 (2014)
C-076
Nakamura, J. et al.
Transport of Coherent VUV Radiation
to Muon U-Line for Ultra Slow Muon
Microscope
JPS Conf. Proc., Vol 2, 010108 (2014)
C-077
Kawamura, N. et al.
H Line; A Beamline for Fundamental
Physics in J-PARC
JPS Conf. Proc., Vol 2, 010112 (2014)
C-078
Higemoto, W. et al.
Investigation of Spontaneous Magnetic
Field in Spin-Triplet Superconductor
Sr2RuO4JPS Conf. Proc., Vol 2, 010202 (2014)
C-079
Kousaka, Y. et al.
Chiral Magnetic Soliton Lattice in MnSi
JPS Conf. Proc., Vol 2, 010205 (2014)

C-080
Nozaki, H. et al.
Li-Ion Dynamics in Li5+xLa3ZrxNb2−xO12
JPS Conf. Proc., Vol 2, 010303 (2014)
C-081
Ariga, H. at al.
Detection of Oxygen Vacancy in Rutile TiO2
Single Crystal by μSR Measurement
JPS Conf. Proc., Vol 2, 010307 (2014)
C-082
Shimomura, K. et al.
μSR Study on Isolated Hydrogen andOxygen Vacancy in SrTiO3
JPS Conf. Proc., Vol 2, 010308 (2014)
C-083
Sugawara, Y. et al.
Hydration Effects on Electron Transfer in
Biological Systems Studied by μSR
JPS Conf. Proc., Vol 2, 010310 (2014)
C-084
Kanda, S. et al.
Development of High-Rate Positron
Tracker for the Muonium Production
Experiment at J-PARC
JPS Conf. Proc., Vol 2, 010404 (2014)
C-085
Tanaka, K. S. et al.
Measurement of Muonium Hyperfine
Splitting at J-PARC
JPS Conf. Proc., Vol 2, 010405 (2014)
C-086
Hao, L. et al.
Effects of Co Substitution on the Magnetic
Excitation in Heavy Fermion CompoundPrFe4P12
JPS Conf. Proc., Vol 3, 011088 (2014)
C-087
Kajimoto, R. et al.
Low-Energy Spin Fluctuations in CuCrO2
and Cu0.85Ag0.15CrO2 Studied by Inelastic
Neutron Scattering
JPS Conf. Proc., Vol 3, 014018 (2014)
C-088
Sato, K. et al.
Temperature Dependence ofSpin Fluctuations in Underdoped
La1.90Sr0.10CuO4
JPS Conf. Proc., Vol 3, 017010 (2014)
C-089
Maruta, T. et al.
LONGITUDINAL MEASUREMENT OF
ANNULAR-RING COUPLED STRUCTURE
LINAC IN J-PARC Proceedings of LINAC2014,
Geneva,C-090
Abe, K. et al.
Recent Results from the T2K ExperimentPublications

J-PARC Annual Report 201478
Nucl. Phys. B(Proc. Suppl.) Vol. 246-247, p. 23

Accelerator Society of Japan, 444 (2014)

C-091
Natori, H.
DeeMe experiment – An experimental
search for a mu-e conversion reaction at
J-PARC MLF
Nucl. Phys. B(Proc. Suppl.) Vol. 248-250, p. 52

C-101
Saeki, R. et al.
Preperation of the charge stripping foil in
J-PARC RCS
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 523 (2014)

C-111
Okoshi, K. et al.
Operation status of the J-PARC ion source
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 946 (2014)

C-092
Nishiguchi, H.
Project of Muon LFV at J-PARC
Nucl. Phys. B(Proc. Suppl.) Vol. 253-255, p. 29

C-102
Kawamura, M. et al.
Present status of klystron power supply
systems for J-PARC linac 2013
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 605 (2014)

C-112
Ito, T. et al.
Countermeasure of the multipactor at
SDTL cavity in J-PARC Linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 977 (2014)

C-103
Watanabe, Y. et al.
Development of control system for J-PARC
RCS main magnet power supplies
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 628 (2014)

C-113
Hori, T. et al.
Improvement for the trip rate of klystronhigh-voltage power supplies in J-PARC
linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1001 (2014)

C-093
Sasa, T. et al.
Studies on accelerator-driven system in
JAEA
Plasma and Fusion Research (Internet), Vol 9,4401113 (2014)
C-094
Harada, H. et al.
Optics tuning at the J-PARC 3-50BT line
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 39 (2014)
C-095
Tamura, F. et al.
Momentum loss during slow extraction in
the J-PARC MR and its countermeasures
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 125 (2014)
C-096
Nomura, M. et al.
Study of high impedance magnetic alloy
core
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 217 (2014)
C-097
Kikuzawa, N. et al.
Status of J-PARC operation data archivingusing Hadoop and HBase
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 230 (2014)
C-098
Oguri, H.
Present stats of the J-PARC linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 313 (2014)
C-099
Tamura, J. et al.
Resuming of ACS high-power test for
J-PARC Linac Energy UpgradeProc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 437 (2014)
C-100
Kinsho, M. et al.
Development of the magnetic dipole
exciter for the incoherent tune spreadmeasurement
Proc. of 10th Annual Meeting of Particle

C-104
Miura, A. et al.
Bunch shape monitor for J-PARC linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 705 (2014)
C-105
Kikuzawa, N. et al.
Development of data synchronization
system for the LINAC/RCS in J-PARC
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 731 (2014)
C-106
Hirano, K. et al.
Development of RF chopper system at
J-PARC Linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 858 (2014)
C-107
Sugimura, T. et al.
Development of a 3 MeV beam scraper for
the J-PARC linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 862 (2014)
C-108
Suganuma, K. et al.
Initial test of thyratron CX2004X
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 870 (2014)
C-109
Tobita, N. et al.
Retrievement of the charge stripping foil
in J-PARC RCS
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 915 (2014)
C-110
Koizumi, I. et al.
Development of a Cs-ceeded Rf-driven
Hion source for the J-PARC

Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 920 (2014)

C-114
Miyao, T. et al.
Beam monitoring system for RFQ test
stand of J-PARC linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1049 (2014)
C-115
Yamamoto, K. et al.
Beam loss monitor system of the Rapid
Cycling Synchrotron of Japan Proton
Accelerator Research Complex
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1060 (2014)
C-116
Hatakeyama, S. et al.
Development of data aqcuisition system
of J-PARC RCS multi-wire profile monitor
using multi-channel digitizer
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1082 (2014)
C-117
Fukuta, S. et al.
Construction of control system for J-PARC
RF ion source & RFQ III test standProc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1122 (2014)
C-118
Futatsukawa, K. et al.
Upgrade of control signal distribution
system at J-PARC Linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1126 (2014)
C-119
Futatsukawa, K. et al.
Upgrade of power supply system for
RFchopper at J-PARC Linac
Proc. of 10th Annual Meeting of Particle
Accelerator Society of Japan, 1149 (2014)

J-PARC Annual Report 2014

Publications

79
C-120
Koseki, T. et al.
Status of J-PARC accelerators
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, FSP010

C-129
Oguri, H. et al.
PRESENT STATS OF J-PARC LINAC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 389

C-121
Nakamura, K. et al.
FABRICATION OF TAPERED COUPLER FOR
INTRA-BUNCH FEEDBACK SYSTEM IN
J-PARC MAIN RING
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 58

C-130
Liu, Y. et al.
OPTIMIZATION OF J-PARC LINAC BEAM
FOR INJECTION TO RCS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 469

C-122
Chin, Y. H. et al.
STABILIZATION OF BEAM INSTABILITIESBY INTRA-BUNCH FEEDBACK SYSTEM AT
J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 67
C-123
Shibata, T. et al.
THE PERFORMANCE OF A NEW FIRSTEXTRACTION SEPTUM MAGNET FOR
UPGRADE OF J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 86
C-124
Kamikubota, N. et al.
NEW SURVEILLANCE SYSTEM TO ENHANCESAFETY OF J-PARC ACCELERATORS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 224
C-125
Okada, M. et al.
DEVELOPMENT OF THE DLC COATED BEAM
EXCITER
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 242
C-126
Sato, Y. et al.
HIGH POWER BEAM OPERATION OF THE
J-PARC MAIN RING
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 245
C-127
Ohmori, C. et al.
RADIATION DAMAGE MEASUREMENTS
OF FET’S USING A RADIATION MONITOR,
RADMON FOR LIU
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 249
C-128
Shirakata, M. J.
Publications J-PARC Annual Report 2014
EFFECT OF THE RE-ALIGNMENT OF J-PARC
3-50BT LINE
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 312

C-131
Igarashi, S. et al.
OCTUPOLE MAGNETS AND POWER
SUPPLIES IN J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 472
C-132
Hasegawa, K. et al.
DEVELOPMENT OF THE RF CAVITY WITH
FT3L MA CORES
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 621
C-133
Shimogawa, T. et al.
DEVELOPMENT OF RECOVERY CONTROLFOR MAGNET POWER SUPPLY WITHFLOATING CAPACITOR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 681

C-138
Satou, K. et al.
THE NEW BPMS FOR THE J-PARC 350BT
OPTICS MEASUREMENTS AT HIGH
RADIATION FIELDS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 713
C-139
Miyao, T. et al.
CALIBRATION OF PHASE DETECTOR USING
IQ MODULATOR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 718
C-140
Toyama, T. et al.
BEAM-BASED ALIGMNENT OF THE BPMS
AT J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 739
C-141
Sawabe, Y. et al.
Development of timing system for RF ion
source & RFQ III test standProc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 748 (2014)
C-142
Yamamoto, K. et al.
Increment of the machine protection
system in J-PARC rapid cycling synchrotron
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 771 (2014)

C-134
Nakamura, S. et al.
TRACKING-ERROR REDUCTION WITH A
LEARNING CONTROL OF MAIN MAGNET
POWER SUPPLIES IN J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 688

C-143
Yamada, S. et al.
RENOVATION OF CONTROL COMPUTERSFOR J-PARC MAIN RING
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 782

C-135
Kuboki, H. et al.
RESULTS OF BEAM BASED GAINCALIBRATION FOR BEAM POSITIONMONITOR AT J-PARC MAIN RING
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 695

C-144
Kikuzawa, N. et al.
Development of tools for the J-PARC
operation data archiving using HBase/
HadoopProc. of 11th Annual Meeting of Particle
Accelerator Society of Japan , 794 (2014)

C-136
Hatakeyama, S. et al.
MWPM DAQ System for J-PARC RCS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 703 (2014)

C-145
Fang, Z. et al.
SOFTWARE UPGRADE OF DSP AND FPGACONTROL SYSTEMS FOR J-PARC LINAC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 828

C-137
Hanamura, K. et al.
BPMS AT THE HIGH RADIATION AREA
(J-PARC MR COLLIMATOR): ANALYSISOF INSTALLATION ERRORS AND ORBITMEASUREMENT ERRORS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 706

C-146
Fan, K. et al.
DESIGN AND FIELD ANALYSIS OF A LARGEAPERTURE QUADRUPOLE MAGNET
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 951
C-147
Maruta, T. et al.

Publications

J-PARC Annual Report 201480
PROGRESS OF BEAM COMMISSIONING AT
J-PARC LINAC AFTER 400 MEV UPGRADE
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 955

SUPPLY FOR HIGH REPETITION RATEOPERATION
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1157

C-148
Nomura, M. et al.
Study of magnetic alloy cut-core for
J-PARC MR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan , 1037 (2014)

C-157
Kurimoto, Y. et al.
A HIGH POWER TEST METHOD FOR
PATTERN MAGNET POWER SUPPLIES WITH
CAPACITOR BANKS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1171

C-149
Hayashizaki, N. et al.
DEVELOPMENT OF LOW ENERGY MUON
LINAC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1073
C-150
Chishiro, E. et al.
IMPROVEMENT OF J-PARC KLYSTRON HIGH
VOLTAGE POWER SUPPLY
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1091
C-151
Futatsukawa, K. et al.
DISCHARGE OF THE 972-MHz CIRCULAR AT
J-PARC LINAC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1112
C-152
Tamura, F. et al.
Development of high power baluns using
MA coresProc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 1122 (2014)
C-153
Ueno, T. et al.
Status of the horizontal paint bump power
supply of the J-PARC RCS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 1135 (2014)
C-154
Takayanagi, T. et al.
Development and present status of newhorizontal shift bump power supply for
injection bump at the J-PARC RCS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 1139 (2014)
C-155
Horino, K. et al.
Report of the temperature problem of newhorizontal shift bump power supply at the
J-PARC RCS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, 1143 (2014)
C-156
Morita, Y. et al.
PROTOTYPE DEVELOPMENT OF J-PARC
MAIN RING MAIN MAGNETS POWER

C-158
Omori, Y. et al.
NEW TARGET POSITIONER FOR
BEAM HALO MEASUREMENT AND
CHARACTERISTICS OF OPTICAL DEVICES
AND DETECTOR ON THE MULTI-SCREENPROFILE MONITOR
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1182
C-159
Akino, H. et al.
NEW MULTI-RIBBON BEAM PROFILEMONITOR WITH TITANIUM FOIL OF 1.2
MICRONS FOR INTENSE PROTON BEAM IN
THE J-PARC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1221
C-160
Nakagawa, H. et al.
THE IMPROVEMENT FOR TIME SHORTNING
AND ERROR WORK REDUCTION IN THE
ABNORMAL COUNTERMEASURE OF J-PARC
MR MPS
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1246
C-161
Takahashi, D. et al.
WEB-BASED INFORMATION SHARINGSYSTEM FOR J-PARC ACCELERATOROPERATION
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1263
C-162
Kimura, T. et al.
IMPROVEMENT OF THE SPILL FEEDBACK
CONTROL SYSTEM OF J-PARC SLOWEXTRACTION
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1279

magnet for the J-PARC main ring
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, SUOL04
C-165
Harada, H. et al.
Ionization profile monitor (IPM) of J-PARC
3-GeV RCS
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 515 (2014)
C-166
Saha, P. K. et al.
Beam commissioning of two horizontal
pulse steering magnets for changing
injection painting area from MLF to MR in
the 3-GeV RCS of J-PARC
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 518 (2014)
C-167
Saha, P. K. et al.
ORBIT beam simulation progress in the
3-GeV rapid cycling synchrotron of J-PARC
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 521 (2014)
C-168
Okabe, K. et al.
A Preliminary study of the vibration wire
monitor for beam halo diagnostic in
J-PARC L3BT
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 535 (2014)
C-169
Suganuma, K. et al.
Operating experience of kicker magnet
system in the J-PARC 3GeV RCS
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 678 (2014)
C-170
Takayanagi, T. et al.
Power supply of the pulse steering magnet
for changing the painting area between
the MLF and the MR at J-PARC 3 GeV RCS
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 681 (2014)
C-171
Ogiwara, N. et al.
Bellows with a new RF shield made ofmetal braid for high intensity proton
accelerators
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 3321 (2014)

C-163
Fukui, Y. et al.
PRESENT STATUS OF RF CONTROL SYSTEMAT J-PARC LINAC
Proc. of 11th Annual Meeting of Particle
Accelerator Society of Japan, p. 1282

C-172
Hasegawa, K. et al.
Status of J-PARC accelerators
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 3830 (2014)

C-164
Sugimoto, T. et al.
Improvement of the injection kicker

C-173
Hayashi, N. et al.
Progress of injection energy upgradeJ-PARC Annual Report 2014

Publications

81
project for J-PARC RCS
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 3833 (2014)
C-174
Hocchi, H. et al.
High intensity beam trial of up to 540 kW
in J-PARC RCS
Proc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 3836 (2014)
C-175
Kinsho, M.
Status and progress of the J-PARC 3 GeV
RCSProc. of 4th Int. Particle Accelerator Conf.
(IPAC '13), 3848 (2014)
C-176
Sugimoto, T. et al.
UPGRADE OF THE INJECTION KICKERSYSTEM FOR J-PARC MAIN RING
Proceedings of IPAC2014, Dresden, Germany
p. 526
C-177
Fan, K. et al.
UPGRADE OF J-PARC FAST EXTRACTIONSYSTEM
Proceedings of IPAC2014, Dresden, Germany
p. 821
C-178
Okabe, K. et al.
Transverse H- beam halo scraper system in
the J-PARC L3BT
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 876 (2014)
C-179
Meigo, S. et al.
BEAM FLATTENING SYSTEM BASED ON
NON-LINEAR OPTICS FOR HIGH POWER
SPALLATION NEUTRON TARGET AT J-PARC
Proceedings of IPAC2014, Dresden, Germany
p. 896

Proceedings of IPAC2014, Dresden, Germany
p. 1256
C-183
Yamamoto, M. et al.
SIMULATION OF DEBUNCHING FOR SLOWEXTRACTION IN J-PARC MR
Proceedings of IPAC2014, Dresden, Germany
p. 1606
C-184
Saha, P. K. et al.
Comparison between measurements
and ORBIT code simulations for beam
instabilities due to kicker impedance inthe 3-GeV RCS of J-PARC
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 1683 (2014)
C-185
Fan, K. et al.
NEW DESIGN OF J-PARC MAIN RINGINJECTION SYSTEM FOR HIGH BEAM
POWER OPERATION
Proceedings of IPAC2014, Dresden, Germany
p. 2097
C-186
Ohmi, K. et al.
STUDY FOR SPACE CHARGE EFFECT IN
TUNE SPACE AT J-PARC MR
Proceedings of IPAC2014, Dresden, Germany
p. 2100
C-187
Kamiya, J. et al.
Beam loss suppression by improvement ofvacuum system in J-PARC RCS
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 2338 (2014)
C-188
Nakamura, K. et al.
INTRA-BUNCH FEEDBACK SYSTEM FOR
THE J-PARC MAIN RING
Proceedings of IPAC2014, Dresden, Germany
p. 2786

C-180
Hocchi, H.
Commissioning the 400-MeV linac at
J-PARC and high intensity operation of the
J-PARC RCS
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 899 (2014)

C-189
Molodozhentsev, A.
MODELING SLOW EXTRACTION PROCESSFOR J-PARC MAIN RING
Proceedings of IPAC2014, Dresden, Germany
p. 3032

C-181
Molodozhentsev, A. et al.
STUDY LINEAR COUPLING RESONANCEFOR J-PARC MAIN RING: OBSERVATIONSAND SIMULATIONS
Proceedings of IPAC2014, Dresden, Germany
p. 1147

C-190
Tomizawa, M. et al.
MALFUNCTION, CAUSE AND RECURRENCE
PREVENTION MEASURES OF J-PARC SLOWEXTRACTION
Proceedings of IPAC2014, Dresden, Germany
p. 3370

C-182
Shirakabe, Y. et al.
NUMERICAL STUDY OF INTRINSIC RIPPLESIN J-PARC MAIN-RING MAGNETS

C-191
Koseki, T. et al.
PRESENT STATUS OF J-PARC -AFTER THE
SHUTDOWN DUE TO THE RADIOACTIVE

MATERIAL LEAK ACCIDENT
Proceedings of IPAC2014, Dresden, Germany
p. 3373
C-192
Yoshii, M. et al.
STATUS OF THE J-PARC RING RF SYSTEMS
Proceedings of IPAC2014, Dresden, Germany
p. 3376
C-193
Yamamoto, K. et al.
Residual doses by 400 MeV injectionenergy at J-PARC rapid cycling synchrotron
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 3379 (2014)
C-194
Kinsho, M.
Progress and status of the J-PARC 3 GeV
RCSProc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 3382 (2014)
C-195
Tamura, F. et al.
Beam test of the CERN PSB wide-band rf
system prototype in the J-PARC MR
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 3385 (2014)
C-196
Satou, K. et al.
DEVELOPMENT OF NEW DATA-TAKINGSYSTEM FOR BEAM LOSS MONITORS OF
J-PARC MR
Proceedings of IPAC2014, Dresden, Germany
p. 3547
C-197
Hayashi, N. et al.
Pulse based data archive system andanalysis for current and beam loss
monitors in the J-PARC RCS
Proc. of 5th Int. Particle Accelerator Conf.
(IPAC '14), 3800 (2014)
C-198
Ohmori, C. et al.
AIR-COOLED MAGNETIC ALLOY CAVITY
FOR J-PARC DOUBLED REP.-RATESCENARIO
Proceedings of IPAC2014, Dresden, Germany
p. 3869
C-199
Wakui, T. et al.
Investigation on HIP diffusion bonding ofinvar alloy and stainless steel
Proc. of HIP'14, 210 (2014)
C-200
Shobuda, Y. et al.
RESONANCE STRUCTURES IN THE
IMPEDANCE OF A CERAMIC BREAK AND
THE MEASURED RESULTS
Proceedings of HB2014, East-Lansing, MI,Publications

J-PARC Annual Report 201482
USA , p. 74
C-201
Molodozhentsev, A. et al.
BEAM DYNAMICS STUDY FOR J-PARC
MAIN RING BY USING THE ‘PENCIL’ AND
SPACE-CHARGE DOMINATED BEAM:
MEASUREMENTS AND SIMULATIONS
Proceedings of HB2014, East-Lansing, MI,
USA , p. 157
C-202
Ohmori, C. et al.
HIGH GRADIENT RF SYSTEM FOR UPGRADE
OF J-PARC
Proceedings of HB2014, East-Lansing, MI,
USA p. 162
C-203
Hashimoto, Y. et al.
TWO-DIMENSIONAL AND WIDE DYNAMIC
RANGE PROFILE MONITOR USINGOTR / FLUORESCENCE SCREENS FORDIAGNOSING BEAM HALO OF INTENSEPROTON BEAMS
Proceedings of HB2014, East-Lansing, MI,
USA p. 187
C-204
Yamamoto, K. et al.
BEAM INSTRUMENTATION AT THE 1 MW
PROTON BEAM OF J-PARC RCS
Proceedings of HB2014, East-Lansing, MI,
USA p. 278

The Beamline DAQ System for the T2K
Experiment
Proceedings of IEEE NPSS2014, Seattle, USA
7097441
C-210
Fang, Z. et al.
PRESENT STATUS OF J-PARC LINAC LLRF
SYSTEMS
Proceedings of LINAC2014, Geneva,
Switzerland p. 224
C-211
Yoshioka, M. et al.
CONSTRUCTION OF AN
ACCELERATORBASED BNCT FACILITY
AT THE IBARAKI NEUTRON MEDICALRESEARCH CENTER
Proceedings of LINAC2014, Geneva,
Switzerland p. 230
C-212
Tamura, J. et al.
ADJUSTMENT OF THE COUPLING FACTOR
OF THE INPUT COUPLER OF THE ACS LINAC
BY A CAPACITIVE IRIS IN J-PARC
Proceedings of LINAC2014, Geneva,
Switzerland p. 264
C-213
Kondo, Y. et al.
BEAM TEST OF A NEW RFQ FOR THE J-PARC
LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 267

C-205
Cousineau, S. et al.
STATUS OF PREPARATIONS FOR A 10
MICROSECOND LASER-ASSISTED H− BEAM
STRIPPING EXPERIMENT
Proceedings of HB2014, East-Lansing, MI,
USA p. 299

C-214
Futatsukawa, K. et al.
CHOPPER OPERATION FOR THE TANDEMSCRAPERS AT THE J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 581

C-206
Shobuda, Y. et al.
THE KICKER IMPEDANCE AND ITS EFFECT
ON THE RCS IN J-PARC
Proceedings of HB2014, East-Lansing, MI,
USA p. 369

C-215
Kawamura, M. et al.
STATUS AND RECENT MODIFICATIONS TO
324-MHZ RF SOURCE IN J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 587

C-207
Chin, Y. H. et al.
PERFORMANCE OF TRANSVERSEINTRABUNCH FEEDBACK SYSTEM AT
J-PARC MR
Proceedings of HB2014, East-Lansing, MI,
USA p. 384

C-216
Liu, Y. et al.
STUDIES ON WAKE FIELD IN ANNULAR
COUPLED STRUCTURE
Proceedings of LINAC2014, Geneva,
Switzerland p. 593

C-208
Miura, A. et al.
VACUUM IMPROVEMENT OF BUNCH
SHAPE MONITOR FOR J-PARC LINAC
Proceedings of IBIC2014, Monterey, CA, USA
p. 430C-209
Suzuki, S. et al.

C-217
Naito, F. et al.
STUDY OF THE ACS CAVITY WITHOUT A
BRIDGE CAVITY
Proceedings of LINAC2014, Geneva,
Switzerland p. 596
C-218
Maruta, T. et al.
RECENT PROGRESS OF BEAM

COMMISSIONING AT J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 646
C-219
Morishita, T. et al.
HIGH-POWER TEST RESULTS OF THE RFQ III
IN J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 649
C-220
Futatsukawa, K.
CAVITY EXCITATION OF THE CHOPPED
BEAM AT THE J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 1023
C-221
Ao, H. et al.
HIGH POWER CONDITIONING OF
ANNULAR-RING COUPLED STRUCTURESFOR THE J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 1053
C-222
INSTALLATION AND PERFORMANCECHECK OF BEAM MONITORS FOR ENERGYUPGRADED J-PARC LINAC
Proceedings of LINAC2014, Geneva,
Switzerland p. 1059
C-223
Kamikubota, N. et al.
INTEGRATION OF INDEPENDENTRADIATION MONITORING SYSTEM WITH
MAIN ACCELERATOR CONTROL
Proceedings of PCaPAC2014, Karlsruhe,
Germany p. 167
C-224
Kawai, M. et al.
Novel monolayer shields of a neutron
powder diffractometer SPICA at BL09 of
J-PARC
Prog. Nucl. Sci. Tech., Vol 4, 156 (2014)
C-225
Yamamoto, K. et al.
Beam power and residual dose history of
J-PARC RCS
Prog. Nucl. Sci. Tech., Vol 4, 238 (2014)
C-226
Sakai, K. et al.
Operation status of interlock system ofMaterials and Life Science Experimental
Facility (MLF) in J-PARC
Prog. Nucl. Sci. Tech., Vol 4, 264 (2014)
C-227
Kai, T. et al.
Experiences on radioactivity handling for
mercury target system in MLF/J-PARC
Prog. Nucl. Sci. Tech., Vol 4, 380 (2014)

J-PARC Annual Report 2014

Publications

83
C-228
Okuno, K. et al.
Application of neutron shield concrete toneutron scattering instrument TAIKAN in
J-PARC
Prog. Nucl. Sci. Tech., Vol 4, 619 (2014)
C-229
Adipranoto, D. S. et al.
Neutron diffraction studies on structuraleffect for Ni-doping in LiCo1−xNixO2
Solid State Ionics., Vol 262, 92 (2014)
C-230
Hagiwara, T. et al.

(E) KEK Preprints
E-001
Ishida, T. et al.
Operational Status and Power Upgrade
Prospects of the Neutrino Experimental
Facility at J-PARC
KEK Preprint 2014-34(F) Others
F-001
Sakashita, K. et al.
Observation of νe Appearance in T2K
Experiment
Butsuri Vol. 69, No. 4, p. 204(J) JAEA Reports
J-001
Hemmi, T.
Investigation of Strain Using Neutron
Diffraction－A Foundation for
Improvement of ITER Conductor
Performance－/中性子回折で超伝導導体内の素線の歪状態を調べる－ITER用超伝導導体の性
能向上の礎－JAEA R&D Review 2014, 111 (2014)

Relationship between crystal structure
and oxide-ion conduction in Nd2Zr2O7 and
La2Zr2O7 deduced by high-temperatureneutron diffraction
Solid State Ionics., Vol 262, 551 (2014)(LiI)0.3(LiPO3)0.7
Solid State Ionics., Vol 262, 833 (2014)
C-233
Tomota, Y. et al.
量子ビーム解析を活用した複相組織制御と力学

C-231
Yoshihisa, I. et al.
Pressure dependence of crystal structureof Cu2O by TOF powder neutron diffraction
Solid State Ionics., Vol 262, 622 (2014)
C-232
Kartini, E. et al.
Structure and dynamics of solid electrolyte

特性発現の解明
材料設計を先導する物理解析技術・計算科学 : 活
用事例と今後への期待 /Microstructural analysis

and computational material science formaterials design, 87 (2014)

Editorial Board (April 2015 – March 2016)

Takatoshi MORISHITA (Accelerator Division)

Masahide HARADA (Materials and Life Science Division) (Editor-in-Chief )Seiko KAWAMURA (Materials and Life Science Division)

Takasumi MARUYAMA (Particle and Nuclear Physics Division)

Atsushi MANABE (Information System Section)

Shigeru SAITO (Transmutation Section)

Koichi MASUYAMA (Safety Division)

Shinji NAMIKI (Users Office Team)

Hiroshi FUKUDA (Public Relations Section) (Associate Editor-in-Chief )Assistant: Shizuka YOSHINARI (Materials and Life Science Division)

High Energy Accelerator Research Organization
Japan Atomic Energy Agency
J-PARC Center
2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki, 319-1195, Japan
J-PARC Center Web Page
http://j-parc.jp
March 2015